Oh man. Why do I always gotta explain this Everytime? lol Ok so there's alot of stuff ranging from User interface to in game data but I think the number 1 thing we need is actually 3 things. Record function, Playback Function, and the ability to save a reset state. These are in 99% of fighting games nowadays for good reason. The amount of things you can learn and practice with quick repetition of different situations is one of the best ways to improve by yourself. There's plenty more they could add like more CPU functions for DI, recovery height, mash airdodge, tons and tons. But at least with our number 1 we can set the CPU to simulate it ourselves.