Version 5.00 firmware for the X-T1 mainly just adds compatibility for the Fujifilm EF-X500 speedlight, including the ability to assign flash specific functions to the quick menu and function buttons. These are the only noted features/changes in the new firmware the the X-T1.
In terms of the X-Pro2, the firmware update was similarly minor, fixing several issues with the camera namely an issue that caused the Nisson i40 speedlight to not fire, which is now resolved, and fixing some AF issues with the XF18-135mmF3.5-5.6 R LM OIS WR. The other notable change in the X-Pro2 firmware to version 2.01 was a fix for some issues with the PC auto save function which the company has now resolved.
Again, just to recap, the X-T2 firmware, which is expected to bring wireless tethering with Adobe Lightroom is delayed again, and is expected towards the end of November if the current timetable holds.