I dont really know why anyone but a monk or a caster would use quarterstaffs ... they are lower damage then handwraps on a monk and there are better melee weapons for battle casters too .. so even they dont use them frequently outside of possibly GS.
Reason i feel not many people use quarterstaffs is because they are str based weapon ... so if you have no str then you cannot use them and if you have high str then there are a ton of better options both from the base damage and in the increased crit range aspects.
But when you see stuff like this
And you have to say to yourself ... why the hell is there another dreamspitter? not only is it just like dreamspitter but its str based weapon again.
I would like to put forth a suggestion that with 1 level of monk you can use quarterstaffs as a finessable weapon. Since FLAVOR wise it fits the monk better then any other class and most battle wizards and sorcs are taking at least two levels of monk for evasion and feats .. .and even more are taking 3 levels for the light fist attack.
There is no reason to not make quarterstaffs finessable .. and its a problem that has gone on for far to long with no intelligent reason not to fix. I mean you guys gave palidans intimidate .. and that is far more gamebreaking then allowing dex monks to use quarterstaffs.