I was trolling through ally list and while scrolling accidentally hired a trash ally. There should be a finale prompt asking r u sure you want to buy this ally. Not just a hire button then boom there yours.
Actually this idea has been brought up, but for the main reason, it won't pass, the volleying other players would be extremely hard, and this will actually kill the game cause people would bored of doing this. But I will bring this idea up again and see what they say. Locked for lack of effort. /lock