Its definitely not rubbish. I'll do a fuller report in the next day or so, I'm a bit tight for time at the moment.
Background, I've still got an X100, had an X-E1, still have an X-E2, had an X-T1 and usually use an X-T2. Today I spent two hours in the company of Matt Hart and two representatives from Fuji.
The X100F, its a good camera, it combines the form factor of the X100 with a lot of the functionality of the X-T2 and the hybrid viewfinder of the X-Pro2, it's fast and very quiet, it didn't seem as fast as my X-T2 when writing to the card, but that might of been that I had a freebie FujiFilm Class 10 card (a present from today) in instead of my usual Sandisk Extreme's. But it locks onto focus fast. - The camera I used is a pre-production model and didn't have the release Firmware in it.
I took a bunch of images during our wander around Liverpool (another grey day), but the IQ looks very similar to the X-T2 (which I would expect), strong punchier colours and nice ACROS monos. I've got some RAWs and JPGs, though LR CC doesn't support it yet!
The images with the 23mm lens are as least as sharp as my X100, and in fact I think they are probably sharper (but I've always thought the X-Trans 3 was sharper than previous Fuji sensors), but its not as sharp especially at F2 as the XF23mm F1.4 at F2, but it wasn't as soft in the corners as I expected, so all good there.
Its lovely and light compared with an X-T2+23mmF1.4, but is noticeably more solid and slightly heavier than the original X100.
If you want a small light package, then its a great camera assuming that you can live with the restricted focal length, the focal length changing feature only works in JPG mode, and if your camera is set to RAW+JPG you can't even select it, you have to be JPG only.
Would I buy one, if I didn't have an X-T2 then probably yes, but having the X-T2 and the 23mm makes it a very considered decision, especially as I would be loathe to part with my original X100
Positives
AF Speed
Joystick Focus as X-T2
Battery same as interchangeable X cameras
Lightweight, compact package
With that leaf shutter, its virtually silent.
Negatives
I didn't like the ISO dial, but you can assign ISO to a function button as before
The X-T2+XF23mm exists (and I have them!)
Colour Images in Provia, mono in ACROS+R, all SOOC - they are Full Size on Flickr
DSCF7107 by
Mr Perceptive X100, on Flickr
DSCF7113 by
Mr Perceptive X100, on Flickr
DSCF7117 by
Mr Perceptive X100, on Flickr
DSCF7125 by
Mr Perceptive X100, on Flickr
DSCF7136 by
Mr Perceptive X100, on Flickr