I think 1 thing that helped with recent seasons is that you have a lot more casts full of super fans where even the hot girl/guy in the cast has been watching for years. Even 'just' 5yrs/10 seasons ago you had hit or miss casts where a chunk wasn't really familiar with the show/game. Hantz really accelerated some of the stuff with idols. Probst/production have been good with changes that kept it fresh and evolving.