Since there's already AI for 1v1 practice, why not add in a Favor of the Gods (FFA) practice mode with multiple AI bots? Maybe even with difficulty levels (increase the aggressiveness of the AI).
The practice mode is great for working on 1v1 combos, but realistically most fights in actual multiplayer involve more than 2 people.
I think an even better idea would be to practice against your friends, assuming there will be the option for private matches, where you can choose who will be in the match with you. You can have someone take the role of defender, just doing basic evading moves/blocks and simple attacks while the other person practices their attacks & combos. The person doing the defending can ramp up or down their aggressiveness as needed, something an AI bot would not be able to do.
In all seriousness though, they have to include this. What if servers are down? Or they're doing maintenance? Private matches vs bots would be the cure.
