Thanks a lot ! Your video is very in depth and precisely defines several problems I had not thought about, I really appreciate it.
I won't go back onto bugs (particularily for weapon selecting with the stick, I forgot to check a bool for the input to be consumed during pausing so it stays stuck) or sfx mixing because these are genuine issues I need to fix.
But for controls, I personally have the index on the bumpers whenever I'm using them, so it made sense to me when I was coming up with them. Anyway I'll just try to have re-bindable controls by next Demo Day.