Another thing I see while chasing audio and rigging my xt4. If you use the usb to audio dongle and send video to a monitor, you can't review your footage with an external monitor attached through hdmi. The audio gets shunted to the HDMI monitor, and that has a delay so is no good to monitor audio from while filming.
C'mon Fuji allow power and audio through USB at the same time and loop back the playback of audio through the usb on playback so that i can check my footage without having to turn off my external monitor.