MailerDaemon

Here is a feature that caused me some grief. If you select Auto for Dynamic Range, the LCD and EVF will no longer display shutter speed and aperture except when the shutter button is pressed halfway. It took me a while to figure out why shutter speed and aperture were missing from the display.

I’ll let others answer points 1 and 2 but I feel able to answer number 3.
Yes it is disappointing that there is no built-in GPS but in fairness Fuji never claimed there was. Using the Fuji app to add GPS coordinates is rather clunky so what I do is this. On my iPhone I use an app called GeotagPhotos
http://www.geotagphotos.net
All is explained on their site but basically you ensure your camera has EXACTLY the same time as your phone, start the app and then it records the position where you took each photo - it actually records a track (using the phone’s built-in GPS). All your recorded routes can then be exported as a GPX file via Dropbox, email, or the web and using Lightroom or a similar program it matches the time along the route with the time you took each photo and then tags each photo with the location. Simples! I use it all the time and it works perfectly. I also get a nice route of where I took my photos as well as them being individually tagged.

I'm on the road about 3-6 months as a stock and travel photographer.  Honestly, if I take a laptop, it's too much for me.  I don't do anything other than SEPARATE my SD cards from my camera and lens back pack/ or camera bags.  Once I take a memory card out of the camera it gets put in my pocket-rocket upside down and the pocket rocket literally SLEEPS with me.  I don't feel like dealing with laptops, iPads, chargers, etc. etc. I focus on making images.  I have enough memory cards to shoot about 15 Gigs worth of images per trip.  This has served me very well in three weeks in Costa Rican jungle, Alaska,  Everglades, Florida Keys, Canada, Prince Edward Island, Nevada, California for three weeks in the Sierra Nevada mountains, etc. And this was just in 2018.  How many images have I lost:  ZERO.  EVER.  And, i've been doing this since 2004.  I'm headed to Germany and Iceland in a few weeks and again, no laptop, no iPad, no other devices except my iPhone - which has 256G of space in case I want to copy some fuji files over to send to my agents and editors.  
I'm happy with my style.  Many will not be.  But I do feel I'm out there to bring back the bacon, have fun, enjoy my travels; not worry about sh*t like backups, laptops, security, locking things up, etc.  
That's my story and I'm sticking to it.  

I always wait some time, when I have to buy something new appeared on the market, a camera, a computer or a car. This because the first runs can always have some problems.
About the X-T3 that's my worry: being built in China it's not the same as being built in Japan.
By a hand they have been able to keep the price low because of this, but by other hand the risks of lack of QC are surely higher.
As your camera shows.
Hope you'll solve the issue quickly.