There are many things that still need to change, such as:
WW's speeches do not evolve as the mind control progresses, she should start out hating and end up being obedient;
Things that can be done with the other heroines, I know that the game is focused on WW, but there should be an option to break the other heroines or show scenes with WW looking and maybe even interacting with the blindfolded heroines;
Make her work change, deliver other types of work or make her satisfy the guys when the mind control was stronger, making her gain Lust (little) and Anger (same value), then Lust and Anger with equal values, finally she just gaining lust;
Have Harley's interactions with WW, they have training ones, but nothing about WW being submissive to Harley, just in the screen images;
There's more content with the two villains, maybe they'll try to outwit Joker and he won't let it go, making us receive a discount forever.
Lastly, I like the idea of the game and such. However, I think it would be more interesting and I hope they do this in the future, to have a game focused on training all the heroines.