Let's take it a step further let's allow players to have this DDR style rotation on their screen at all times! Also let's let the computer just do it for them! Also let's forget about the players and just have perfect NPC allies!
Forget the whole MMO part when you can just program perfect parties. We get to watch them run the dungeons for us and we can stand in town with the gear they earned for us. It's the final evolution MMO players have been waiting for. All the reward with none of the game.