It would be great to practice attacks when you get to the point of having nothing else to do. I am thinking like being able to go in to old megacrab levels, but have no reward, as it is a training simulator. But it let's us have some fun and experiment more. Megacrab is great when it comes, because I can play a lot more than usual. But they are few and far between. I understand that as you need to limit the introduction of resources into the game. But it is so awesome it would be great to play the crab more often.