If possible, remove some of those things that makes the game too easy/fast/boring: Too much P2W stuff, Starting TF:s alone or without having done the required contacts first (like katie hannon), moving between villain/hero side without doing tip missions (Kill the damn bird or make him do something else!), starting events with a simple click (Adamastor and I think halloween, winter etc...). And so on.
I want to earn the things I get. Not just get them. 🙂 And I'm not sure why, but all TF I've done so far have been way easier and faster than before. Would be nice to have that feeling of actutally accomplishing something when you have done a big TF.
Other things, maybe a way to sort your characters in login screen. Oh and maybe some more fun praetoria content. Those are pretty zones! 🙂 Then I can't think of anything else atm.
Keep up your good work! It's so nice to have our city back! 😄