Since the last patch we now have separate sensitivity settings for melee/ranged/ADS, but I noticed that staff secondary attacks use the regular ranged sensitivity and not the one for ADS.
This is a problem because you learn to control the game a certain way and it becomes part of your instinctive reflexes. I often miss charged shots with void staff because I try to control it the same way I would ADS a lasgun, or any other weapon with a RMB function.