Feature Request: Adding (Blocks with different textures), (layered textures) and (image effects) if possible.

These are in order of what I would love to be in Mcreator to what I would like to be in MCreator

1. MCreator has support for Items that have multiple textures that can change depending on the state of the item. I feel like MCreator should do this with blocks as well, since if I were to make a block that's similar to for example redstone dust, it would be far better to have (n different textures) than to have ((n different textures) AND (n different blocks)).
2. This leads me to my second feature request, layered textures. For items and possibly blocks. My idea here is that there could be different layers that contain textures that can change like your regular old textures. For example, (a blue light would turn on when rain is pouring) and (a yellow light would turn on if the player is on fire).
3. Finally, I think that image effects would be a nice feature to have. My idea is that there could be procedures to set certain effects like (hue rotation), (greyscale), (brightness) or (transparency) which would effect the textures of blocks.

I have near to no java coding experience so I have no idea if any of these are possible at all.