It would be nice to add a feature/toggle to stop 2D items from facing upwards (the z-axis) because while there isn't necessarily a problem with the current implementation, it isn't faithful/accurate at all to their vanilla 2D predecessor from 1.7 and below which is what the feature is inspired by.
A toggle to have only 3d blocks behave normally/spin around like in vanilla would be nice too because they face the player with the feature on and well... It doesn't look too good.