Yeah the music is very weak save for a few. The battle themes are the weakest in the series to me, which is very disappointing. At this rate, Graces might best Hearts as weakest OST.
And one thing this game needed was positioning. Unless I'm missing something you can't position characters, so whomever is your lead will always start in front closest to enemies which sucks. Aggro is a whole other issue, though Vesperia had the same problem too (enemies love going for your character). Though at the same time, I've seen enemies ignore me and just go for my healers. Bosses especially love this.
And one thing this game needed was positioning. Unless I'm missing something you can't position characters, so whomever is your lead will always start in front closest to enemies which sucks. Aggro is a whole other issue, though Vesperia had the same problem too (enemies love going for your character). Though at the same time, I've seen enemies ignore me and just go for my healers. Bosses especially love this.