I'm sorry, but all the weapons get benefits from jumping. Some weapons even change spray patterns depending on whether you're on the ground or not. Hell, my alternate main, the nozzlenose, requires jumping in close quarters so that the spray changes to a wide pattern instead of straight line so I can manage being strafed.I'm not talking about inkbrush/roller users that jump once during the start of their attack wind-up, but users who hop constantly the entire f*king game.
I find it hard to believe that the devs wanted everyone to constantly jump up and down while playing. Like fire hopping in Mario Kart, it's an exploit that has no business being in the game.
Maybe you should be jumping more?