Disable double tap to swap the weapon or have an option for it instead
Having two ways to swap weapons is counter intuitive and most of the time only one is preferred by someone.
While you're at it, the loot still doesn't appear instantly in a box, just fix it already, quick swapping to another armor is still a mess.
Weapon bolting in upon changing the slot, what's up with that, why is it still happening and why isn't it fixed?
Reduce muzzle flash, reduce screen shake or remove it entirely, disable FOV change "FEATURE" of some abilities, it's more of a downside leading to poor aim and one not wishing to use the ability.
These are only a small amount of things that only amount to player dissatisfaction, which in the end reduces one's wish to still play this game. (not taking into consideration the big ones IE: hackers, bad matchmaking, code net and leaf, the ones listed are small things that can be easily implemented/fixed in a matter of hours if they're acknowledged as an impairment).