I have read that quite a few photographers are replacing their X-Pro1 with this model, or making it their primary camera and using the X-Pro as backup. I think this is mostly because of the auto-focus that has been greatly improved and hits its mark far better than the older model and the X-Pro1. News on a X-Pro2 is still very quiet and I personally have no issue with that. Fuji, take your time, we are in no rush. I would rather see a refined product, than a rushed job to fill our gear lust.
In my opinion, the X-E2 is currently the best camera that Fuji has, bar the X100S, but that is in a different class.
One big change they have made, and I've seen the same remarks about it all over the place, is that they have removed the view button and I'm not sure why. You now need to set it in the menu, but I would rather have that feature missing than something like the AF-selection or ISO. Besides the button changes on the back, the feel and size is identical to the X-E1.
It's really not the end of the world and one can easily deal with it. After the 3 weeks of use over the Christmas period, I missed the view button less and less, again a personal preference.
There is a list of somewhere close to 80 changes to the camera. The Wifi option really caught my eye, but to be honest, during my time with this camera, I used the feature only once or twice, and that was to test it and show off. It is a very cool feature, but not one that will primarily make me buy this camera.
What would make me buy it over the X-Pro1 or X-E1 is the obvious AF improvements, including the continuous focus (AF-C). It was a bit hit and miss at times, however it has definitely improved greatly from the X-E1 and X-Pro1. Another new feature I liked was that one can change the focus points in AF-C. In the past there was always this nagging feeling in the back of my mind wondering wether the camera will get focus, but I can honestly say that that feeling was gone with this model.
The camera operation felt more responsive and quicker to move into and out of the menus, the overall performance improvement of the camera was very noticeable.
The EVF is much brighter and appears to be bigger than even the X100S. It does not lag or jitter and is very smooth, even in low light. The LCD on the back, from what I could see, is the biggest yet out of all the models. I can say even to the point that I did not miss the OVF as much as I thought I would.
The colours of the X-Series are always pleasing, be it RAW or JPEG, and ISO performance is very good. I've been able to make images at 6400 without too much worry about noise levels.
The exposure compensation has increased from -2/+2, we now can go as far as -3/+3. I don't really have to talk about the image quality, as it's up there and very good, no complaints as always. The Jpegs still blow me away, the image below has not been edited whatsoever.
While using this, I did miss the size of my X-Pro1, but that is very much a personal preference. The X-E2 size is very handy for travel and general carry-around.
There was one firmware update that came just as I got this camera, which fixed a few issues people had with the camera.
In conclusion, if the AF performance is a must for you, then by all means grab it! It's been a while since I used the X-E1, but comparing it to my X-Pro1, it's worth it with just the few improvements I spoke about.
I also had the chance to test the 23mm with this camera, for which I have written a tiny review over here.