I have had the X-T1 for 3 years and ordered the X-T20 thinking that I did not need all the features of the X-T2. It arrived Monday and I handled it, mounted my 35mm f/1.4 and took some photos. Autofocus is very quick, the touchscreen is nice for selecting focus point though not as handy as that on my X70 (since I'm usually shooting with the EVF) and Acros really is quite nice. All that said, I had to return it today; it's just too small.
I can't hold it with one hand even with the 35mm mounted without pushing the D-pad buttons with the base of my thumb (they do feel much better than the mushy ones on the X-T1 but those would be more appropriate on this camera). I can lock the D-pad but then can't move the focus point with any alacrity. (Appropriately, it takes a few seconds to lock and unlock). I mounted my 56mm f/1.2, 90mm f/2 and 18-55mm and they all feel quite unbalanced such that a one hand grip absolutely requires locking the D-pad. As much as I want to like this camera, I think it's just too small (and my hands are rather average-sized; 7 1/2 gloves). I thought about ordering the grip but I don't think that will solve the problem. What it needs is a bit more real estate to the right of the D-pad or less prominent buttons. Otherwise, it's a really great camera. I even think I could live with the smaller viewfinder which I was able to manage even with my eyeglasses on. I guess I will save my pennies and get the X-T2; or hold out for the X-T3.... .
I'm quite happy with the 14, 35 f/1.4, 56 and the 18-55 zoom. When I travel I carry the 18-55 with whichever prime makes more sense for what I plan to shoot; usually, that's the 35. As much as I like the 56, I really only pull it out for portraits; just seems big and heavy on the X-T1. Have never tried the "perfect" 90 but as nice as it is, I think I wouldn't use that focal length much. I use my DSLR for the long stuff; like others, I find that balances (and performs) better.
Like others have mentioned, for whatever reason, I just like the rather imperfect 35 f/1.4 and the way it renders (and feels)...