I second that this needs to be fixed. Three months of the same games certainly removes some of the Fun from FunTrivia, and even though my team just won League A (first time ever under the new system, woo!) with these games, I'd still love to see more variety.
Also - Team Heroes, Daily Game and Smartest have always been games that count. I agree that Heroes should always be there, but are Daily and Smartest also guaranteed? Once again, I think the more variety the better, although if you've decided that those two games should always count, so be it.
My understanding is that all Leagues will always have Heroes and Daily Game, but the other games are supposed to rotate each month.
(Additionally, Leagues A, B, and C always have a GM game, which changes every month).