The point of the show is for people to get out of their comfort zones, aren't we supposed to expect otherwise normal or boring people go feral? If they're boring then either its out of the contestants not taking the show seriously or production not doing their jobs. I take it Sam takes more pride in his work as opposed to Jet, hell he's already shown that he's not afraid to kick the top "content king" Cole when he was acting out of line. The shock of Jimmy leaving is hopefully going to create an "oh shit" moment that hammers into other fish that "hey, maybe we really can't fuck around". The desperation will begin to sink into all contestants soon...
If this is a bit and Jimmy ends up coming back then whatever sense of despair and tension that the contestants bring will be lost and this will mark the true end of Hellhouse.