Quick-access-bar keys don't work 90% of the time unless you are standing perfectly still (and make a great target so). Spamming the keys help, but not always. We need to reliably be able to get our weapons out/switch weapons when such keys are pressed once, especially when sprinting. Same problem with jumping/vaulting-keypresses, very unreliable and often leading to frustration and/or the players death. Reliability and functionality of these inputs are priority #1 because they are essential gameplay elements.