A creative idea and kind of mind bending with having to control multiple characters with different input. In a way, it reminds me of the WiiU Nintendoland game where you control two guards with the two sticks separately. I went through it decently quickly and the feedback I would have is there's no need for a 3rd input as unless the plan is local co-op, you don't have enough hands to do everything at once. The character select and action with the hotkeys reminds me a lot of RTS games, which makes me wonder if it would play better that way. The follow command is smart to ease the control confusion, but at the same time, since they have collision and the follow is really copying the player input, it led to a few situations where they blocked each other. I think this idea would be pretty fun as a couch co-op where up to 4 people control a character since you have that setup already.