One thing I've noticed, so far, is that Mark stopped actually picking players to leave several games ago. The last three tests that eliminated players had school kids pick players to leave, three captains pick a player to leave, and a game of Jenga determines who leaves. The last person Mark actually picked to go was Laurel, and that was five players ago.
Since this show has turned into a series of games to determine the winner, they might as well redesign the show to actually be a bunch of actual games to find a winner. Game 1, they play Scrabble. Game 2, basketball. Game 3, Candyland. At the end of each day, send home the person with the lowest score for that day.