I recommend taking some time to try out different characters too, don't just stick to Asbel (good advice for any Tales game, but especially this one).
Also, clearing the future arc opens up even more combat possibilities with Accel Mode, it's kinda nuts (although those Mystic Artes are perhaps too easy to spam.)
Yup. I just beat Graces' main scenario last week, currently a good ways through the Future Arc.
Still figuring out all the quirks of Accel Mode and all that.
Thoughts on using the other characters in combat (minus Asbel)
-Sophie: Her A-Artes are pretty awesome; B-Artes are a little awkward, but having healing/revive is nice. I like using her quite a bit.
-Cheria: Her A-Artes feel so clunky to use; I mean, I know she's not really an attacker, but it's weird. Great caster though.
-Malik: He's got good stuff all around. Ranged A-Artes for keeping stuff away, making distance; Heavy-hitting spells to wreck stuff. He's great.
-Hubert: I feel like I suck with him. Either not enough CC to do combos, or I finish a combo then get wrecked after being vulnerable after a combo. Prolly just need more practice, I suppose.
-Pascal: Haven't used her as extensively as the others; from the looks of it, she's got some powerful stuff, it's just a matter knowing how to use everything. From what I have played, it's been a little awkward, but plenty manageable.