The rewards in quests and mission are to low. A lot of players quit the game in the last days because there is no fun any more in the game. When you are only waiting for the needed ascension materials for several weeks it makes no sence to play the game any more. Because we want to play a game and not only waiting that it goes on.
Also the the heroes which can be received in summons are very frustating. Sure you want to earn money with the game, but don’t forget the players want to PLAY! And a lot of people spend money in the summons and receive only 3 star heroes. They will not do this very often and quit the game at least very frustrated.
So I please you to think about how you can improve the possibilty to get 4 and 5 star heroes and especially the needed ascending materials for the different levels.
To the players: Like this, if you also just want to play!