Lack of content?

Game needs some grind love to make the players continue playing, my stamina still locked 50/50 for days, I just have nothing to do besides training boring useless 4* in tower.

Like FFBE, we have the TMR system that makes the game durable and some events but in this we have to wait two weeks to play some missions that can be done in less than 10 minutes

So, Nintendo what are you doing? The game is dying already.