Getting out of the column of notoriously stupid villain would be a good thing. Vergil is supposedly clever; why doesn't he use his wits and smarts instead of brute force to achieve his goals? He could get on Dante's good side to get his blood, instead he first erects the tower, kills thousands of people, gets his ass beaten by his own follower and stabs Dante multiple times half to death, without even achieving his goal.
There are smarter courses of action. Power doesn't always equal physical prowess (well, yes, in anime it does). They could have made him so much more interesting.