They'd lose too many people too quickly. + that failed horribly in season 9. It's a great idea, but then it'd go from 10 to 8 and 8 to 6 to just have it for 2 weeks. They usually cut off all those types of twists before or the week of jury.
They might add a little something on to it other than just the cliques splitting up, but other than teams, which would finish the game in like 3 weeks, I can't really think of anything other than the vote back in stuff or like a coup d'etat. That'd be pretty sick to reintroduce considering Boogie never used it.