This game is broken

This may be considered as an invalid issue, but the game is broken and unfun to play. Here are some problems:
1. You just randomly decided you would make redstone hook up to pistons without directing it, which broke all my creations, thanks.
2. Pistons just don't work; they are inconsistent: sometimes they work, sometimes they don't.
3. My brother apparently is having mobs teleport (mostly sheep.) They're in their pen when he's in, but when he quits and rejoins, they've somehow teleported out of their pen AND out of the building they were in.
4. Obsidian makes block below have a dark shade.
And many more that I can't remember right now.
So here is what I request of you:
1. Worry about the quality of your product, not the quantity of updates/stuff in the updates.
2.make one huge bugfix update (0.17 maybe)
3. When you're adding anything, test to make sure it works instead of leaving it.
5. Slow way down as I stated in 1.
This is in no shape or form meant to be rude or disrespectful, but I do believe you can do better. The game is getting out of hand, and the bugs are taking over. Please fix this. I love Minecraft, but it's too buggy for me to even do what I want. Also one more thing... Too laggy.