If it's up to mod discretion it's implied to be overpowered. That's just gaming 101.
probably is op. but so is an investigator. so is a gun smith. so is a lie detector. so is an unkillable legend that can actually give out these roles and is also a miller so he'll be confirmed at the start of the game. yeah that role actually existed. what's your point? without these roles town wouldn't stand a chance on this site.