It would be really nice.

I play with full effects (only in pvp) so that I can appropriately react to most things, but they need to tweak stuff like SMN's flashbangs and maybe a bit of AST's celestial revolution where its LB makes all the environment dark, when these things happen multiple times in a very short time frame, it's like someone shining a bright torch in my eyes. The game does not need these constant screen wide flashes.