I know the optical view finder ... ISO performance and Dynamic Range
You can't dismiss the XP viewfinder. The viewfinder IS the reason for the XP. If you want an autofocus,
RF style soapbox shaped without humps camera with interchangeable lenses there's no other choice. If you don't care about the OVF don't buy the XP.
The X-PRO2 has nothing to do with rangefinders, but I am completely with dmaclau. I'd add that only the most expensive cameras (X100F, X-T2, X-PRO2) have dedicated ISO dial, which is absolutely terrific and of paramount importance for a user who wants a really clean, photography oriented camera of a classic style.
The entire Fujifilm line is about these physical controls of old times:
aperture ring on fix-aperture lenses,
shutter dials, and
ISO dials as well as
(optical) viewfinders. With an X-A3 and an XC lens, you will get none of these. With more expensive lenses you will have aperture rings. With second tier cameras like the X-E3, X-T20 you will have shutter dials, but no ISO dials. On the top cameras you will have everything along with hybrid optical viewfinders on the X-PRO2/X100F and a very high quality EVF on X-T2.
All of the wifi-enabled Fujifilm cameras are capable of direct printing on an Instax printer, which gives immediate analogue experience. This is the mission of Fujifilm as explained by
Shigetaka Komori, Chairman and CEO of Fujifilm Holdings CO. ISO performance, DR: who cares? They are available from any manufacturer; Fujifilm has its own great implementation, too, of course, but it's basically the same as from any recent make of any brand. People are not buying into Fuji for ISO and DR. Fujifilm excellently combines clean, intuitive, classic camera operability with state-of-the-art digital photography technology vs Nikon's failed attempt with the Df. The Df dials were excellent but Nikon crippled the rest of the (expensive) camera hilariously (no video, no tilting screen, weak AF system, 16M-only resolution on a FF sensor), unfortunately.