If seven other people want to clear a dungeon they're sick of seeing as fast as possible then I'd let the guy watch his cutscenes if he's adamant about it but I'd merrily press on and kill regardless. S-E gave the players the ability to watch the cutscenes in their inns and ignoring the desires of the majority of the people making it possible for you to clear the dungeon is a bit of a selfish stance. I wouldn't vote kick the cutscene watcher though but I would happily kick a tank or healer white-knighting and holding the rest of the run up.