I don't think that mass roleclaiming would necessarily help. While the assassin could roleclaim at this point since they're out of shots (and are now, effectively, vanilla), the keeper probably shouldn't since they'd definitely be the next mafia kill should we mislynch. As for the last role, the cop could roleclaim if they've already used their one shot (also providing information), but the tracker probably shouldn't since they can still detect a mafia kill. (And the trusted could, y'know, do whatever they wanted.)
I realize things are going well, but there's still technically a chance that we can mess this up.