I downloaded him on Xbox One as well, my general impressions match up with everyone else's so far. I've only messed with Metallic variation, really.
One thing I noticed is that he has a lot of cancellable strings. Like, cancellable after the last hit. So, you can do something like f121, then cancel the last hit into his gold/lava skin for stance changes/aftershock delayed low for a potential mix up?/crystal skin for armored pressure?
Couldn't really mess around with him too much to find anything particularly noteworthy. I will say that that in lava stance, Tremor's db+1 is a restand during a juggle. I don't know how much frame advantage he has on hit for lava stance db+1. On block, I forget the frame data; didn't look particularly safe.
Now I've got to go to work. No Tremor for another 15 hours or so.