Woah thanks for the reply, and don't worry about going on too long, I find all the perspectives really interesting. I'm making an Arena FPS as well so it's cool to hear your perspective on general gameplay things.
I actually like the color system, it does add a rhythm to the gunplay and combat, so I think you should try to make it work. Depth is almost always a good thing imo
Definite on the max shooting angle thing, it makes Terrorbyte pretty difficult artificially (especially on maps with long sight lines), but I think the ultimate solution probably is to have enemies choreograph their attack for longer, making it easy to tell when you need to start dodging for projectiles.
I don't think I got stuck in the wall, was just trying to reset (a restart keybind would also be appreciated!) and did an abrupt stop.