Ron,
Thanks for the great list.
Weight and size is one of my concerns, I really like to compactness of the X-T2. When I tried the X-H1 I really liked its handling and the T4 seems to be edging into that size range. When the H1 was 1/2 price not too long ago, I was really tempted. I'll probably wait for the X-H2 to make a decision, Fuji Rumors I think is expecting it sometime.
I noticed that the T4 has the back buttons shifted one position counter-clockwise. AF-ON is at AE-L, AE-L is at Q, and Q is at AF-L. Did this throw you off at first? AF-ON, is back button focus the default now? On my Canon gear I used BBF all of the time, I have not been able to get accustom to it on X-T1&2. The AF-L button is in a different position on the grip from the body so I am always searching/feeling for it... just doesn't work for me.
Is there still a Boost mode with the grip? Or do the new batteries put in full time boost mode?
When saving RAW+JPG does in camera HDR save the raws and the HDR JPG?
I use Focus Bracketing, any changes to it? I could go read the online manual.. ;-)
I think I read that the IBIS works with the lens IS. Do you find this to be true or do you find yourself picking one?