My camera store had a Fuji sponsored event today, with X-T2 there and available for handling with pretty much any lens one would want to try. In terms of size, handling, menu, speed of AF, AF tracking, etc., I can tell you that in "my hands" it more than lives up to the hype.
The new vertical battery grip, feels even better than the X-T1 grip. AF is as fast, or faster than my X-Pro2. "Blackout" when on Boost mode w/ the grip is all but non-existent and I think it will either be no issue re AF tracking of moving subjects, or at least so minimal as to be managable. I tracked some cars zooming down a major SoCal boulevard on AFC, 11 frames per second, and had no difficulty keeping my subject accurately framed.
I had already pre-ordered from this dealer, and am #3 on their list. I'm more excited now than before.
Rand