I got the Better Generation mod.
Playing on the sky dimension is so frustrating.
There are so many times where I have been shot off by skeletons and pushed off by zombies or creeper explosions and lost all of my stuff.
This one time I looted a dungeon that was just hanging out in the middle of the sky and got all of this cool stuff. On my way home, I was shot off by a skeleton and lost everything.
tl;dr - Skeletons are OP and the sky dimension is annoying.