A.I. Is pretty good all around, except for Melia and maybe Shulk. I would heavily advise against having Melia in your party unless you are controlling her.
There is an easy way to grind items if you want to stay in the same place. Just save, and then use the reload option in game.
Holy crap...
X's unique monster theme, Uncontrollable is downright amazing. It is so calm and heart racing, and pumping.
https://m.youtube.com/watch?v=syrTstCZe-4
I have to say, Sawano is doing a great job on the soundtrack(I've seen very little gameplay but I just had to listen to some of the music).
I have to say though, while the New LA music is really good, it will very much clash with it as well. A blood pumping theme to go explore, get some fetch quests, talk to NPC's, and relax.... Ok....
Like I said, I really love the theme and it does fit the environment to an extent... But it's totally unfitting with the actual gameplay(well, what I assume the gameplay is).