FoToEdge

All I need is the new Sensor and Better AutoFocus, & a Flip Style LCD Screen.  

The two lenses I purchased back in 2013 with my X-E1 was the 18-55 (Amazing lens) and the 35 1.4 (also amazing).
 
Since then, I've added several others, but the 18-55 and my 16 1.4 are the two lenses I would pack if told I could only take a couple of lenses.  If I had to choose ONE only, it would have to be the 18-55.

XF 18-135
XF 35 F1.4
 
Since both were my 2 first lenses, it is kind of hard to beat them with more recent lenses.

sure like the xe2 form factor, would be nice to have a flippy uppy screen.  I don't particularly like the SLR'ish hump. the rest is all good

First of all, I bought the X-E2 because I liked the "rangefinder-like" feel and the "film-like" sensor. It also fits perfectly in my hand and suits my shooting style. As I used the camera and became familiar with it, it exceeded all of my expectations! Your suggestions of the XT-1 viewfinder, the floppy-tilty screen, and more phase-detector focussing detectors (like the Sony A-6000) would make me actually consider an upgrade. How about adding in-camera 5-axis shake reduction like the Sony and Olympus cameras.
 
Personally, I would rather have a 16 mp sensor with wider dynamic range, lower noise, and higher ISO than a 24 mp sensor with greater detail and the same specs as the X-E2. I was actually considering upgrading my Canon 7D body to handle action photos. Guess I'll put that on the back burner. There are some spectacular X-T1 action shots in other topics.
 
Some of the firmware enhancements I would like:
 
- Separate selectable focus points for horizontal and vertical orientation.
- Flash exposure compensation on the quick menu.
- Combine facial focussing on the same menu item as the other focussing modes.
- Optionally create separate file folders based on the date taken.
- Increase the bracketing range to +/- 3 stops for HDR photography.
- Electronic high-speed shutter.

If the X-E3 gets a tilt screen, hopefully it will be fully-articulating, like on the Panasonic GH4, Canon 60D. Failing that, the standard tilty-flippy screen would be preferable to a fixed screen like the X-E1, X-E2 have.
Either way, I would really appreciate a touchscreen, even thought the button-oriented Fuji menu is nice once you get used to it. 
 
Interested in an improved sensor, higher megapixel count. Minimum 24Mpxl, please.
 
Would really be interested in improvements in: shutter speed, fps, and buffer/memory and Autofocus performance (esp. tracking).
 
Video improvements would be very welcome. 4K, please? It would be nice if Video functionality was more than an afterthought. It's too bad that my smartphone seems easier to shoot video with.
 
Additionally, IBIS would be fantastic as it would give stabilization to any Manual lens. There are a few non-Fujinon Macro lenses that I'm keen on that would benefit.

A combo of the new features of X-Pro2 with the features already in X-T10 would be a great combo. These are my hope-for-features:
Flippy-tilty screen. Being able to review photos on the rear display by pressing the preview button, like I think the X-T1 and X-T10 can X-Pro2's new sensor (assuming it gets one, but that seems likely), but not more than 24 MP. Being able to control more features from the function buttons, like setting focal length when using adapted lenses. More accurate focus peaking. Most of the time it just looks like everything is in focus. Put the tripod mount away from the battery/memory card door. It's a pain to have to unscrew the quick release plate to switch batteries and cards. A less useless phone/computer/camera communication setup. The WiFi feature is a joke. Better ergonomics, a thumb grip is a must on the X-E2.

Mostly all I would change (assuming the usual internal upgrades to match the sensor etc. to whatever the current standard is) would be to add some kind of thumb rest that didn't mean I had to take up the hotshoe.

For me it would be enough to put the specs of the X-T10 into a X-E3! Tilt screen is my most wanted.

Hello
 
I'd like it to be lower than the X-E2, to enter in thiner bag. I thin the bump of SLR is their big form disadvantage, so let's go to the minimum taller in the rangefinger form!
 
second wish is an high point eye viewfinder with the new epson 1400*1050 panel...

The LX100 has a 13mm X 17mm MFT sensor.  I still have the first Canon G1X as my 'grab and go' or 'leave in the car' camera.  It has a 14mm X 18.7mm 1.5" sensor and the size of the body and retracting zoom give some indication of the size an APSC fixed zoom camera might be if Fuji were to offer one as an X100Z.  Obviously an APSC model would be bigger again.  It could be a very good camera with a quiet leaf shutter, a decent EVF and a lens of a reasonable compromise in speed. I don't agree that the idea is a poor one.  It would sell to a different market from the X100 series with the 23mm prime lens.  It might in fact sell very well - as the LX100 has done for Panasonic. 
 
My guess is that after all the comments made about the X30 at launch, there will be a 1" sensor in the next iteration of their X "compact".