Rancor should activate the exposed + moriable effect on the obsession when hatch is shut.

I get that the wording is different (it EXPLICITLY says when the final generator is completed vs when the exit gates are powered when comparing it to perks like NOED, Hope, and Adrenaline) but I feel it wouldn't be game-breaking if it did proc.

Do NOT give the location reveal though. Only the exposed and mori for the obsession. If that's still too "OP" keep the Obsession seeing the killer's aura. So when the killer shuts the hatch, the Obsession now knows where the hatch is, (If they have a key, they know where to go to unlock the hatch) and possibly what exit gate the killer is headed towards first. (+ opens up some neat plays like faking which gate you are going to as killer, etc.)

There's some fun synergy with a build like STBFL, PWYF, Dying Light, Rancor, but half of the fun of the build is insta-gibing the obsession with a mori after ignoring them all game. You can't just sacrifice everyone else, shut hatch, then one-punch-man the obsession out of existence, you HAVE to let survivors complete all generators first which ruins most of the build's appeal.