Thanks for the large report. We generally prefer one issue per report, though. Also, most of these have already been reported; feel free to vote for those ones:
Bows don't show animation while in offhand
This is MC-88356.
Shields and bows do not stay in the user’s hands when he aims with a bow and sneaks
This is MC-86127.
The sword slash particle animation is backwards when in third person front view.
I think this is MC-74764.
feature requests section
Feature requests should be posted onto /r/MinecraftSuggestions, not here; the tracker is for bugs only. Those are both fair suggestions (though you're not the only one who's suggested them).
The walking sound is not in sync with the players walk frequency in 3rd person, but in first person the screen bobbing is just right. Perhaps change the speed at which the legs & arms move?
I haven't noticed this one, and I don't think it's been reported. It does seem more like a feature request though. (I actually didn't realize that the bobbing was aligned; this'll probably bother me now 😃)
Walking on carpets makes the sound and running particle effect of the block underneath it.
This is MC-8820, but it's fundamentally caused by the next issue...
Running near water shows the sprinting particle effect coming from the water. This just looks cheap.
This is MC-1133, and it's rather hard to fix unfortunately since it's a fairly deep issue in the engine.
Small, thin floating lines and gaps in the corners appear on a person's character model and tools they are holding in both first person and third person
This is either MC-73186 or MC-1794.
Shield does not appear to be shielding in multiplayer when it actually is.
This sounds like MC-86253, but that was already fixed. It might also be MC-82995?
Why do spiders horizontally! Plz mojang! It’s not that difficult to fix!
Not entirely sure what you mean by this, so I'm going to go with 5.
In general, these are all valid bugs, but they've already been reported. Please search first, and try to stick to one bug per report, thanks.
pokechu22
MC-130222
migrated
Thanks for the large report. We generally prefer one issue per report, though. Also, most of these have already been reported; feel free to vote for those ones:
This is MC-88356.
This is MC-86127.
I think this is MC-74764.
Feature requests should be posted onto /r/MinecraftSuggestions, not here; the tracker is for bugs only. Those are both fair suggestions (though you're not the only one who's suggested them).
I haven't noticed this one, and I don't think it's been reported. It does seem more like a feature request though. (I actually didn't realize that the bobbing was aligned; this'll probably bother me now 😃)
This is MC-8820, but it's fundamentally caused by the next issue...
This is MC-1133, and it's rather hard to fix unfortunately since it's a fairly deep issue in the engine.
This is either MC-73186 or MC-1794.
This sounds like MC-86253, but that was already fixed. It might also be MC-82995?
Not entirely sure what you mean by this, so I'm going to go with 5.
In general, these are all valid bugs, but they've already been reported. Please search first, and try to stick to one bug per report, thanks.