I like the concept but consider the funding behind the idea you proposed. this would mean a whole new game concept or at the minimum another tab added to the start screen. but the money it would require and also the time that it will take to program/ reprogram the game then send it out in a new update has me a little skeptical. But i like the idea as a whole it would maybe even be another incentive to veterans. To provide a new totally different challenge for them to master. they can make up moves it would be like an fighting game with a infinitely large character pool and move pool.

To add to your idea Under the Tab option that would be under the main menu there should be a Single player option where the CPU is loaded with random moves that the GameMakers would load into its move pool and you can use your custom made moves or some standard moves that the Makers could add to your tori's move pool as default. There should be the Multiplayer option which is self-explanitory. Then there should be a Move Maker tab Were the Player can Make custom Moves, add hotkeys, and even Name them. When they are made they are saved to the list of moves and their hotkeys that should be accessible through the in game pause screen.

Thats my idea about how the design should go.

Also i think that the Currency for that game and the current one should be attached but not the items again giving people more of a reason to throw money at the game. They could buy things like the colors and joints that you see in the normal game but in their 2D perspectives. The player would win TC for each multyplayer win like normal but I think it should be at a smaller amount per win as to not overpower the orginal games favor like 5tc per win instead of 10 like the normal booster-less game brings. I do believe that boosters should be transferable between these two games but the boosters value is cut in half if you play the 2d version. This way It wont over power the orginal game and if it comes down to a Computer Vs Mobile thing it will even out the favor (Phones are pretty much becoming small computers).

I really dont know how it would play out but if it ever was accepted these are the ideas i would recommend. If you would like some more ideas about this because this has me intrigued just ask.