>>718474473
>gameplay
Raid content elevates it beyond other autobattlers (yes they do exist outside of gacha), but most of it is pretty simple by mature of that genre.
>generous
The pity system giving guaranteed results puts it above other games that monetize themselves this way
>free units best
Agreed with you since limiteds are meta defining, though serina is pretty good for a 1 star.
>story
Solid but has varying quality depending on the writer.
>soundtrack
I dont think there are any songs that I dislike listening to. The use of leitmotifs and piano during story in emotional scenes is power-of-friendship tier cheesy but pulls at your heartstrings in an almost formulaic way that still works. There are some fun tracks you might add to a playlist but most of the songs serve the purpose they accompany in the game (battle music, menu music, etc)