This is the third gacha I've tried out after FEH and Sinoalice. Couple thoughts:
Sucks that these games seem to rarely have English VA. I get that not everyone has Nintendo money, but all the Fire Emblem character being voiced in English really helped me immerse myself in that game more.
Stamina. I detest stamina. It is absolutely the #1 thing preventing me from fully enjoying this genre of games. Bad luck when rolling is fine, whatever, who cares. I don't mind working with the resources I'm given. But being forced to wait to play more is absolutely awful. As someone who's actually enjoying Sinoalice a lot more than the average person, I've gotten to the point where stamina is becoming extremely restrictive and it's borderline ruining the game for me.
Those genre-specific complaints aside, the game seems pretty cool so far.