The show has been good for the likes of Forrest and of course Bisping - coming from the UK he needed that mainstream exposure to boost his profile. There is nothing amateur about him. There always seem to be some guys who appear as fillers. I'm not sure if that is because of a genuine lack of skill and/or experience, or because they just lack passion for the sport and mentally don't prepare themselves.
The way they are in the house seems to be very like how a pro MMA fighter does things - they are essentially each others camps for the duration of the show. I would love to see the tasks come back though now that the Tito & Ken season is out of the way. Surely Randy will bring them back.