I don't agree with this, because I don't know what the fourth role is. 2-shot weak doctor isn't especially strong. Tracker isn't especially strong. 1-shot delayed cop or vig isn't especially strong. I'm a lot less concerned with how much town power has been claimed given that my role is probably a dud.Okay, so.
Let me run it through you.
Basically.
This game has, confirmed, a Weak Doctor.
This game has, confirmed, a tracker.
This game has, basically-confirmed, a Cop-or-Vig.
This game has, basically-confirmed, the existence of a fourth hidden role. (Admittedly though the player isn't hiding their role nearly as well as I'd prefer but OH WELL.)
Everyone agrees that the scum must have a strong counter to this power.
Additionally, your argument falls flat because the only relevant power role I've been (at least in the past 4 years) is a roleblocker; if we lynch Kokichi, and kokichi flips scum, and someone turns up with a roleblocked claim tomorrow, that INSTANTLY hard-clears every living player who has never been a mafia roleblocker. It'd literally be suicide for me to roleblock one of them.