Oh yeah, heavily dislike the role as a general rule when I'm town. Love it when I'm a wolf. A wolf+vig kill in the night is strictly speaking worse than two wolf kills, sure, since the vig might accidentally hit a wolf, but that's kinda the thing: 99% of the time a vig hits a wolf, it's definitely an accident.
A trigger-happy vig can ruin things for town even if everything else is going pretty great for them.