OK, finished that one on both A and B ending. I felt the endings were a bit of a mess where there seemed to be a bit of a "different people have different part of the knowledge of what's going on", and Minata in particular was a bit confusing, goal wise.
Gameplay wise, the equipment giving skill stuff was imo a failure, as a lot of times you were forced to keep a really bad piece of equipment just because it had a decent spell on. Delica in particular was a caster with no offensive spell, which was lol.
I ended up pushing down the difficulty to normal at the end of the routes, simply because some bosses in specific were life sponges and I don't see the point in a fight taking more than a couple minutes (Murahama and Reinhart iirc were big offenders there).
I /think/ I did everything, but I never found the B rank access card, and I never managed to grab the gale bite spell for Delica, while the "full save" has her having it. I don't know if I got a bug or if we get it through a side quest.