Question on #4... in what format are you exporting to the Desktop prior to importing to Photos or Lightroom?
Preface by saying - I don't shoot raw too often and I have only recently started using C1, so this is more for the JPEGS
Depends... so far the majority have been the variants. I found a preset ICC profile that someone built for the FUJI XT-1 Classic Chrome (better than JPEG Neutral) and I like the way they look so I am using that.
Once they are exported I use the import tools. I wish the app did include an "automatically added to photos" directory like iTunes.
For example... this past Sunday we took some Easter pictures. When we got home i loaded them to C1 and applied the profile. I exported them to a folder called Easter. The folder was then imported into Lightroom with the COPY and not Move option. I then imported the same photos into Photos. Once imported I created a shared album with my wife for her to use on her phone and upload to Facebook. In case you have not tried yet, the Photos app on the phone can pull shared streams. She wanted one in B/W. I pulled up the image on my phone. Edited it with enlighten and save a new one back to the shared gallery. The new one is now in the "cloud". She was able to pull it down and upload to FB.