I was being a bit rough with the sarcasm, and didn't really deserve so many likes... and I agree that technique has a big role to play. At the same time, Fuji is asking a lot of users to figure out what kind of settings will work best, and providing very little useful guidance - so that isn't really on the user, IMO.Technique is actually important, and I know that the camera works. I have missed images due to user error, but I don't blame the camera. Anything can be improved theoretically, and I think that folks should not expect the camera to do everything for them flawlessly- it just isn't ever going happen.Wow, you must have been really busy checking on everyone's technique to be able to draw that conclusion with such confident clarity. Apparently, we shouldn't discuss the issue any further. Congratulations.Most of the "issues" are user related.
I'm frustrated right now with Fuji AF because I'm in the process of documenting that the XF 70-300 - which is very good and sharp at AF-S when holding steady, but appears to be so seriously flawed at AF-C when tracking (in narrow zone setting) that it is often much poorer in IQ than the XC 50-230 in those situations. I'm repeating tests and experimenting with alternative settings, but its pretty clear that there were some poor decisions made with the floating IS element design resulting in not locking focus... and it is related to overcorrection of spherical aberrations resulting in very poor bokeh - but not consistently. You end up with a lot of double-image background bokeh and a muddy focus point when tracking because the floating element probably was undersized. (All elements are so small on the XC 50-230 - it isn't surprising that it is quicker and more reliable at AF-C.)
Bottom line is that a lot of the AF problem probably is related to poor OIS (and possibly IBIS) design. That's the theory in progress, and if so, the "firmware fix" might mostly be better OIS/IBIS hardware design some time down the line.