You even think Filppula is a better passer than Hudler?
Yes. (Maybe not better, but at least equal)
One big thing I think Filppula needs to do is just slow down, he always just seems sort of frantic out there. Generally when people think of Hudler's passing skills it's squeaking one through the slot on the PP (this is the impression I'm under, anyway). Once Filppula learns to slow down the game I think that he can do the same.