As a huge Fuji Fan also, I would sure hold on to see what Fuji does with the X-Pro2 @ 24MP. One thing I have realized, the need for larger MP's in my business has fallen off, way off. I also love all the facets of the Fuji System you already mentioned, and have only wished for just a bit more resolution. Hopefully Fuji can pull this off in 2016, with first the X-Pro2 and then a new X-T2 or whatever.
I agree IBIS is great and Fuji has not shown any interest in this, still using OIS on their lenses. But Fuji has really shown that they seem interested in the future of the X-Trans product. They have given the users several major Firmware updates, rich in feature enhancements, that are not common with Sony, Canon or Nikon.
To me, the Sony is a great camera, and I love the files. I also rented one and worked with it with my Nikon glass until the Metabones adapter I was using jammed on a lens (another story). I missed the ability to have AF, and the ability to see the aperture information in m files. I also did not want to go out and invest in a large number of A mount Sony lenses or E mount, so for now I have stayed with Nikon and Fuji. However there is something about the Fuji files, that I love and will continue to invest in their products.
For me the Fuji camera and lens line up is excellent and all of their XF glass is top end.
Paul