Add a place where you can practice fighting against any champion in the game of your choice.
A lot of champions are added to the game with rather difficult special attacks to dodge. It's hard to learn how to dodge them when you rarely encounter such champions as defenders and a special attack simply destroys you.
At the same time, there is only one too-simple parry mechanics training on the training ground menu. It would be great if a place was added to the training ground to select the champion you would like to train against. For example, as it is done in DMC 5, you can go to a special place in the menu and hone your skills against an opponent who causes difficulties.