In response:
A) It's not noticeable faster in my experience at all. In single AF I struggle to see any difference whatsoever (with the lenses I have and high performance\boost modes activated). C-AF is improved (you don't get that "breathing" for a start), and tracking is better. I never found the X-T1 to be rubbish in that regard though, but welcome the improvements.
B) This I would like at airshows, that's pretty much it though. I only dabble with wildlife and everything else I pretty much always frame in camera and rarely crop (apart from wonky shots!). Rarely print bigger than A3 which 16MP is great for (why I kept the 1Ds2 for so long!). Edit: Actually this will be useful for me at motorsports as well as airshows. Taking a wider shot with the option to go in tighter is good.
C) On the X-T1 I had all 4 dpad buttons for changing AF, so no different in this regard BUT I now have those 4 buttons back on the X-T2 for other things which is great.
D) Never been one for bringing up shadows too much. The highlights I haven't seen that much difference with, but it is a bit better I think.
E) Is it really
much better, it's a bit better.
F) Not noticed any difference here, the better battery reporting is good though. I've shot over a 1000 on a single battery on the X-T1.
G) If I was shooting weddings still this would be an essential and much needed feature.
H) I don't find it noticeable shooting them side by side, not enough for me to go wow anyway.
I) Yep!
I am underwhelmed with it, but that's just me. It's a great camera, but so is the X-T1. If I had to keep only one (and only had Fuji) it would be the X-T2. It's a nice improvement in usability for sure, just not the massive step up that reviews make it out to be. Not for me anyway, if it was I wouldn't be revisiting keeping my Canon kit