Great work on your site. I particularly like your portrait section.
Cheers for the kind words.

As far as high speed. Flash is concerned, this is where I particularly prefer the external strobes. The einsteins are as good as the profotos for high speed capture. The problem obviously is getting a fast enough shutter speed. A lot of guys really like the X100/s for it's leaf shutter for this reason.
This is always the issue, which compromise do you go with. Only HSS as far as I'm aware allows you to be completely flexible with shutter aperture combinations, the compromise there is reduced output at high shutter speeds, but then wide apertures do compensate for that. Or it can be addressed with more flashes. Take for example shooting a portrait on a sunny day and you want to use f2.8 and flash. Using the 1/film speed guide to base exposure for iso 100 makes for 1/100@f16 which equates to 1/3200@f2.8. Not sure what leaf shutter or external strobe can cope with that.
I'd actually like to have the time to do some testing of the compact system cameras in that kind of context - real world location portraits and so on. A tripod in the woods is nice but not always the most telling about usability for working pros.
For working pros good [consistent] ergonomics is absolutely key, missing a shot or fumbling in front of client with poorly designed controls do not make one look professional.
And as lovely as the Fuji is, it's clunky in a couple of areas as fiddly shutter dial and conflicting muscle memory issues will trip you up. I shoot manual 90% of the time, so clumsy controls are more of an issue than for the typical automatic shooter.
As for the control layout/style, I hear what you're saying about the modern gear, but for many there's a real pleasure in the traditional analog controls. I'm kind of on that side of the fence thought I appreciate really good modern design as we'll. I'd be excited to try a really forward thinking 'next' type of camera. But there's no taking those risks (bc of the $$ involved, sadly). On the other end, the return to a retro style is good too. Fuji has gotten a Lot right about that.
I love beautiful objects and I think the Fuji is certainly a very nice looking camera, but my absolute pet hate in design is where something's functionality is impaired in order to make it prettier. To me that is the epitome of bad/stupid design. A camera is not an objet d'art, it is a tool and should be primarily designed with that in mind. Mind you I've often thought cameras are to some men male jewellery. Things to be hung around neck in order to look pretty/cool. Some folks at the local camera club I went to whilst at school used Leicas for displaying. I also thought Leicas were poorly designed if you wanted to actually take photographs though and definitely appeal to the style over function crowd.