I don't have access to 16 characters. (3 of them are paid) Ok. Even ftp players gathered all the available heroes. (Today you have not added any).
I have not added anything, I don't work for Lilith.
How about balancing the old characters? Not that hard to slightly strengthen Gail, Riley, and Gus in order to make them more competitive.
Isn't that what is being done for several months now? Those heroes *will* be revised sooner or later, you can't have all heroes at once, usually about 2 heroes per month. Look at sumiko in the last update, she went from one of the worst heroes in the game to a very useful hero.
Bug fixes, balancing the arena? When 96 level 45000br wins against 100 58000. Changing the auto mechanics of the fights in the arena, when all stand and wait for 3 seconds?
Bugs are being fixed almost every patch. Arena fights are all about team composition, it's a rock-paper-scissors game, rating doesn't mean anything.
Maybe you are working on a new ingame chat? From the fact that now I want to puke. There you can write only 3 words. No one uses them! Only for "looking for members"
Yes, the ingame chat sucks. I don't think they have any plans to update it, but we can hope.
It's not about the amount of feedback, but the way you present it. Insulting people while not help getting your message across.