I can confidently say this is my least kaneko game (unless majin tensei counts)
I've finished this game a year and a half ago and my experience with it was...slow
The dungeons are redundant, it's either empty hallways, one way path tiles or teleport tiles--nothing exciting, nothing creative. Though I will say, I might have bias since I liked devil summoner 1's dungeons lol

I don't really fuck with the character designs, it's mostly the uniform honestly. The sprites are.. mid, I didn't like it, it's so.. off putting, I don't know how to say it. They also made demons look uninteresting, some boss like Nyx somehow look like not a boss at all, it's just the layout of the combat looks bad and I know even devil summoner uses grid system, it's just somehow they way it looks and how the layout is, the grid system just felt...ass?
Also the final bosses ain't really shit it's just spam the same offensive magic, spam the healing items it's ugh..

Good ost and character writing tho