TL;DR at the bottom.
It’s no secret by now that the bug fix that corrected non-force weapons quelling at high speed has been met with a mixed response. Most people either want high speed passive quell back or just want people to learn to play around it. Both those arguments have some merit, but I frankly find both of them boring. I’d like to offer an alternative that puts the option into the player’s hands. For reference, I play a psyker using a surge staff and a chainsword for headcanon purposes. A friend plays a force sword and kantrael lasgun build. My proposed option benefits both, as well as the bizarre double-not-force-weapons player.
Simply put, make increased passive quell while wielding non-force weapons a feat. By preference I’d replace Mind In Motion at level 20 as the name already kinda fits and I personally find the effect it has to be not worth considering. If the balance is thrown off too much by having non-force weapons vent at max speed then use a medium speed between max and minimum, but give those oddball psykers that use an axe or an autogun an option to build around that fact. If that decision is taken it means that a force weapon is still the premier method of quelling quickly, and that a slower but still viable approach exists while allowing you to engage enemies with a non-force weapon.
Lastly, yes I was a battle wizard tranquility main.
TL;DR: Replace a feat (preferably Mind In Motion) with one that causes faster venting on non-force weapons so people can choose to play the class that way if they wish.