I noticed the quarterstaff have had its threat range increase to 19-20(x2), while the Dire Mace has not. It's quite silly to me that a simple weapon that requires no feat to use ends up being superior.
So I suggest to either nerf the quarterstaff back to its initial critical threat range, or otherwise (and perhaps, idealy) change the dire maces' critical threat range. At the end of the day, the dire mace would end up being the equivalent in damage to a double-sword, although bludgeoning.