We have something in common (competitions) I miss it at times, but I think if I even mumbled anything about going back into MMA or competitions in my sleep while dreaming my wife would divorce me.
In this game however, twf tends to indicate using things in both hands on one target, while THF is using things in both hands to hit many targets. Hence the distinction for the quarterstaff in this instance.
Also, I'd have to go back and check (its been a good long while since i pnp'd), but I believe they have it as a 'double' weapon in PnP play already. Useable with TWF. Someone who still plays would have to confirm or deny this however.