Reading the line "success bonus" on the raid description below the VC implies that scum don't necessarily want to always stop town from succeeding if they benefit too.
For all we know garunteeing a raid is actually a bad thing if the prize is first come first serve and they want the rewards. So honestly I wanna say early role claim is bad. It could just be a powerful scum wanting more use of their ability.
VOTE: Mastina
Follow my wisdom anytime, friends.