I was a Nikon boy with only single digit Nikon bodies and huge pro glasses, but always wanted something smaller that I could carry with me more often. When the X-Pro1 came out with the 3 lenses I jumped on it, not only because the size but for the OVF as well, that was the main attraction for me, but for my biggest surprise I was using the EVF most of the time and I was really happy with it, so when the X-T1 was announced with its giant EVF I just had to have it.
I will get the X-Pro2 once it's out for sure, but if the X-T2 will have a better EVF than it will become my main camera.
So for me it all comes down to the EVF.