Fundamentally broken Nether biome distribution since 20w17a

This is what I ended up with when I teleported there:

I actually found a soul sand valley with a radius not much more than 12 blocks. I've seen pre 1.16 soul sand patches bigger than that! To find this excuse of a "soul sand valley", use the seed -8511534518682158031 and run the following command:

/execute in minecraft:the_nether run tp @p -228 73 156

I think Nether Wastes being the most common biome could be working as intended. The nether would be far less interesting to explore if all the biomes were equally common.

I have generated large areas of the Nether to determine the biome distribution, and in the 8192×8192 sample I examined, the proportions were: 8 (Nether_Wastes): 57.278%, 170 (Soul_Sand_Valley): 6.820%, 171 (Crimson_Forest): 25.287%, 172 (Warped_Forest): 1.718%, 173 (Basalt_Deltas): 8.897%.

Details here: https://www.reddit.com/r/Minecraft/comments/g83xx3/the_arrangement_of_nether_biomes_has_changed/

Looking at your own previous post here:
https://www.reddit.com/r/Minecraft/comments/fxm3qx/nether_biome_map_from_20w15a_rednether_wastes/
I'm inclined to disagree.  The areas in the 20w17a biomes are extremely small and spotty comparatively.  They don't seem to merge together well like in previous snapshots and it results in many of the biomes being extremely separated between nether wastes biomes rather than smoothly transitioning.

Perhaps it was the intention to change the generation, but the bug here is the result of that generation change.

I also attached your images as a comparison.

If its really working as intended and not mentioned in the changelog, then i'm not a big fan. Its suppose to be a nether update not a nether update that is still separated by large nether wastes.  The old nether wastes had its toll, I would like to see myself some of the new biomes not far out.  

However, except the fact that it is "overdosed" for some reasons, it's good the idea of of giving to the nether wastes the scope to be a sort of "transition" biome between other biomes, as this makes the nether biome arrangement particular, if compared with overworld.

Maybe do you want to realize something like this generation?
(Note that every biome is isolated to each other)

Red -> Nether Wastes -> 40%
Pink -> Crimson Forest -> 24%
Brown -> Soul Sand Valley -> 14,5%
Blue -> Warped Forest -> 5,5%
Dark Grey -> Basalt Delta -> 16%

Percentages are calculated on the image above, with Photoshop, and are similar to this feedback request: (20W06A) Increase Spawning of Nether Wastes
(Except that the request was made when the basalt delta did not exist)

I don't personally think this is a proper solution as there's still an oversaturation of nether waste biome.  On paper it seems like 40% nether waste biome would be good, but the ending result is just a bland and uninteresting nether rather than an update that is meant to bring life into it.  with the addition of basalt deltas, I kind of feel like at max the biome distribution of nether wastes shouldn't be beyond 36%?

On top of that it would also mean that the other biomes couldn't properly transition between each other, they'd just be "islands" of biomes and you still get very small biome areas.

so far I still feel like the 20w15a is the best example of what nether generation "should" look like, biome distribution wise.

(i.e, you wouldn't find every forest biome in the overworld completely surrounded by deserts.  You'd find several biomes bordering each other.)

if we look at this post: (20W06A) Increase Spawning of Nether

+ use the values purely as "weights" instead of just percentages because basalt deltas didn't exist at the time of this post

+ assuming basalt deltas should be the same rarity as soul sand valleys, the new "percentage" values should be:

Nether Wastes ->36.36%

Crimson forest -> 22.27%

Warped forest -> 22.27%

Soul Sand Valley -> 9.09%

Basalt Delta -> 9.09%

I don't think these values here are totally accurate and I also think soul sand valleys and basalt deltas should be more common than presented here (and nether wastes less common to balance it out), but there's definitely some huge discrepancies even when taking into account the feedback entry.

Nether wastes currently make up 57% of the nether, while warped forests make up only 1%.  Again, this results in much of the biomes being small islands of biomes in nether wastes.  This is especially apparent for warped forests.

It seems like some change was meant to be make nether wastes more common, but it looks like in this instance Mojang may have vastly over did it and cranked the dial up to 11.

I will say that I do believe in @gaspoweredpick ** 's comment and idea of distribution of biomes.  Especially for resources like wood and stone.

Nether biomes use overlapping Perlin noise maps to allocate the five biomes. Perlin noise can produce artifacts such as very small instances of biomes.

The implementation of Perlin noise in 20w15a was flawed. That version used two overlapping Perlin noise maps for the first four biomes with a third noise map for the Basalt deltas placed on top. This implementation was flawed because some biomes could not share long borders with certain other biomes. It was common for the first four biomes to meet at corners, and when this happened without basalt deltas the biomes were always in the circular order (1) soul sand valley, (2) crimson forest, (3) nether wastes, (4) warped forest. Because the Perlin noise in that version was too noisy, instances of very small instances of biomes were quite common.

The 20w17a update was much better because this restriction on biome bordering was removed as was most instances of very small biomes due to the use of less noisy Perlin noise. Not all of the instances of biomes will be this small, and the solution is to keep exploring. Furthermore, not everyone has the locatebiome command available such as players on servers or ethical SSP players with no-cheat worlds. Players without access to locatebiome may not even notice some of the tiny instances of biomes.

Where the current biome mix could be adjusted is the relative proportions of the biomes. Superficially, they are fine. Not all biomes should be as common. As implemented, the Nether wastes work well as an "ocean" in the Nether to tie the other biomes together (which would work even better if its distribution was somehow tied to the Nether's lava ocean). Some tweaks can be made such as making warped forest more common. 1.7% for warped forests is probably too low, but it is higher than the probability for jungles, flower forests and badlands biomes. 3% to 5% may work better here.

Nether wastes being the most common biome is probably intentional. This makes it possible for players with old worlds who want to keep their Nether to explore new Nether chunks with a more seamless transition between new and old. The less Nether wastes there are, the harder this is to do.

Edited to include more details from the comments.

These changes look suspiciously related to community feedback. However, one look at certain posts on the feedback site shows that the changes are way to extreme according to feedback. Nether wastes are now too common while warped forests are incredibly rare. All the new biomes except the crimson forest generate incredibly small for some reason, even though there were few suggestions for this. Here is a couple changes that were poorly implemented:

• Although there were suggestions for nether wastes to be more common, the percentages specified were less extreme. Many also agreed that if Nether wastes became more common, they should have variants, so the way it is now is actually controversial.

• Although I suggested that warped forests should be smaller than crimson forests, Many voted for warped forests to compose "15%" of the Nether. 15% and 1.7% are pretty far from each other when it comes to rarity.

• Although there were a few suggestions for soul sand valleys to be rarer, note that these suggestions existed before soul speed and the fix of MC-170840, so opinions on the soul sand valley may change. In fact, I made a comment that soul sand valleys should be more common just recently, and got more support. Also soul sand valleys were made smaller for some reason, usually so small that soul speed is practically useless.

On the topic of Nether biome changes being suspiciously related to community feedback, if it were up to me, the Nether should be composed of 25% Nether wastes, 25% crimson forest, 25% soul sand valley, 15% basalt delta, and 10% warped forest. Nether wastes, crimson forests, and soul sand valleys should have a 375 block radius on average. Warped forests should have a 250 block radius on average. Basalt deltas will greatly vary in size because volcanic activity is unpredictable. No more tiny biomes! This would make the Nether more balanced by making resources like wood, stone, piglins, and soul speed easier to access.

This is a feature request. 

We might still tweak the biome distribution in the Nether.