yep i dont think all maps are optimized equally, some i can run full server at 4k, 60 fps locked (sumari, kohat, yeho), some 1080p + supersampling x2(kokan, chora, firstlight, al barash, logar, narva), and others only 1080p. (goro, fools road).
Smaa, shadows low, only bloom on, everything else maxed out.vsync on.
7700k @ 5ghz
Rog strix 1080ti
16gb HyperX @ 3333 mhz
and trust me when you play at 1080p 2x SS or 4k and have to go back to 1080p without supersampling everything looks very aliased serrated, really harder to see the enemies, and it makes your eyes tired much faster.
optimizations for the maps to run more equally should be a priority imho, maps with too many trees density are the worse in my experience they should be addressed first, maybe trying to share the trees assets in groups that uses the same texture..idk. something to match the performance on all maps, this way we with capable hardware could at least run all maps at 2x supersampling, or even better, at 4k witch is amazing for squad.