There is also extreme choppiness in an area I built that uses redstone, chests, and itemframes (this seems to be an pre-existing issue though).
I've also noticed some blocks getting glitched.
I will second the mob caps are rediciously low, I would appreciate if 4J could tell us why the Xbox One can't support an increased cap over the xbox 360. Not just with passive mobs (35 villager?!?!) but the fact that spawners are now pointless. If you want to keep the hostile mob cap low could you implement the new enchatning system at least? Or allow us to manually increase the caps understand that those changes may impact performance?