I don't see how they can deem "sleep" or "paralysis" as useless. It literally renders the enemy immobile. If you had any other offensive ability to use in conjunction, it's a free kill. That, and the fact that you can just keep on re-using paralysis and sleep is just stupid. Even if you can't kill the enemy, you can easily escape by locking them down and meandering away. The thing is, it's not like he changed his abilities in any way after getting the boot either. He's just op from the get-go, but he was still kicked out because his skills were "too weak". I'm not sure if the point is to show that the goddess is stupid and only cares about flashy moves and such, but if so, that's just a bad reason