Mobstates/Entitystates (Read before remove)

This is how I would imagine it in MCreator:

Mobstates would be toggled with procedures and AI tasks (except for baby mobstate), the mobstates would be made in procedures (with ability to change models, textures and bounding box) in mobstates, there would be a baby mobstate, that isn't set with procedures, it would just ask for a baby model if current entity is breedable.