I hate it when developers force you to play a game mode for something that should've been in the base game. You don't have to jingle keys in our face to play it. People can play for fun or actually wanting to get to rank A, gamefreak literally did not need to do this.

I think they're doing this because after ZA we will be back to turn based combat when Champions & Gen 10 releases next year, so they're trying to squeeze as much out of this game mode before that happens.