The characters all have in-depth stories, though we've seen just a few so far, and all 'identities' have a mini-story for their universe.
The esthetics I think are subjective, but also that there's some undeniable attention to it, and quality. This is both for graphics and audio, including voice overs. Personally I find it very cool and perfectly representing the game ambience and mood. The fights look awesome, which is good because you want to look at what's happening if you want to learn the game - which you want to, but it's a kinda steep curve and the in-game documentation only helps to a point .
The gameplay is fun, I'm loving that you actually have to think. All characters are viable since team synergy is more important, though some of them are easier to use; but the game forces you to stray from the meta at times and I think it encourages using base identities. I know that the difficulty level was adjusted in the third chapter, but I don't know how and I wish that I had gotten to play it before that happened. Clearing the current story content was very intense. The final battle for me, who walked into it with just a bit of preparation, was emotionally in line with the story; I literally won with a lone surviving Sinclair and a bunch of hp. I had to retry several times but didn't get frustrated as I tend to, because it was challenging but not unfair, relying on skill and not having the rarest sinner (who knows that might have helped, but I had to dump mine to win).
The daily routine is now clearing an Exp and a Threads fight, and it should hold my interest until I beat all 10 on the highest difficulty, which has probably already happened for some, but is going to take me a while.
Updates with bug and balance fixes have been coming fast and steadily for now, but I'm looking forward to the next story.
Update: the questionable security update seems to have been toned down, with the check on your installed apps and debugging mode gone (haven't verified but it's in the patch notes, and I haven't heard anyone say it's not true). But I heard that you can't play on a rooted device still.
So the fact remains that occasionally the team comes up with ridiculous implementations, but as long as the community is active and complaining they will fix it.