So according to my ingame clock, I apparently played this game for 10+ hours yesterday! Here are some impressions/complaints.
-New universal skills you earn via combat accomplishments are pretty neat, though I can see some of them being a huge pain to unlock.
-Quite a few framedrops, especially when entering combat and 4+ enemies spawn.
-It appears that Hard mode reduces your exp gain and increases your gald drops, but I haven't confirmed it. I forget what Second difficulty does, I think it improves your drop rarity/quality?
-Skill acquisition seems slower than usual, though I haven't played a vanilla run of a Tales game in a while so I might just be crazy.
-Only 5 skill shortcuts leads me to believe that skill count in this game will be much lower than usual, though I hope to be proven wrong.
-Save point grade shop system is neat, but I don't see myself using it often.
-The new area map is a downgrade from Xillia 2. You can't see what's in other areas until you enter them, so if you're not sure where the next quest marker is, you'll have to wander around until you find it.
Combat
-Combat speed feels a bit slower than Graces F.
-All steps add 1 to your chain, I don't remember if this was the case in Graces F. Lets you use later level A artes by themselves.
-All attack chains are limited to 4 unless you burn a bar to extend it. You can only spend the bar before the 4th attack, and you can spend it multiple times for longer combos. However, the bar regenerates pretty slowly, so combat feels restricted compared to Destiny R/Graces F/etc. However, this is a buff for casters, because to compensate for the low chain count they've increased the casting speed buff to 20/40/60% for each number of chain before a spell, so spells come out a lot faster than before.
-When a combo ends, the enemy has invincibility/penetrate(haven't confirmed which) for a brief period of time.
-Graces F style parrying with back/side/forward step are still in, but the window is smaller than before.
-Forward step travels a very short distance at first; you need to unlock a long step ability before it becomes more usable.
-The camera tends to freak out when fighting near walls, if your target is up against a wall and you approach it, sometimes the camera will get stuck against the wall trying to zoom out. I've had several occasions where all I could see was an extreme closeup of the enemy while I was trying to attack it.
-Weak point system is a static damage modifier to all attacks in the combo after weak point is applied, so it's basically just an improved Destiny R weakness system. I've seen a slowly decreasing bar under the combo counter, but I haven't confirmed what it does yet. 2 different types of elements, the weird a arte one from Graces F with dragon heads and junk, and the usual fire/water/etc. element system. Hitting with any attack with these properties will trigger weakpoint. So far, enemies seem to be guaranteed to have at least one A arte weak point.
-Damage when not in kamui seems really low, especially with the combo chain nerf. So far, kamui seems to be the most efficient way to spend bars for damage since it only costs 1 bar.
-There's an attack where you spend 1 bar in kamui for a high damage attack with huge startup. I've seen times when it comes out almost immediately, but I haven't figured out how to trigger it reliably yet.
-Tenzoku characters are essentially expendable, since if they die they can immediately be swapped out for another. When swapped out they regenerate health at a surprisingly quick pace. If they were dead when swapped out, they must regenerate to full before being summoned again.
Misc.
-You can toggle costume music on and off, so if you really want to hear im@s music all the time, you can!
-Speaking of im@s, I don't know which songs the Miki/Yayoi costumes play but the Haruka one plays Go My Way(recycled from Xillia/Xillia 2) and the Chihaya one plays Metome ga au.
-Like Xillia, you get costumes that play battle music from previous points in the game if you want to listen to previous music.