This is very helpful!
I have yet to play Metroid Dread but it's on my list of games to play when I have some time! I will definitely see how they handle the 2.5D situation.
Doors swinging away from the camera would probably be ideal, Thinking about making the enemies trigger the fade effect along with making the pillars thinner.
I'll look at the platforms in the 4th room and see if I can adjust them!
Thanks again for all the valuable feedback! Hopefully you'll enjoy the postjam version we are cooking up!