superuser1
Headphoneus Supremus
I briefly tired usb out to the iDSD BL and it worked though a bit flaky on Fiio Music, however that was on 1.1.7. Since i can do coax out i might just try that too but last time fiio music did falter when playing 24/192 files. Wonder why. The additional ease of usb out is that people already have the necessary cable solutions handy.I wish it would work with more devices too. What I would suggest is using coax for digital out with anything that isn't working (if you have that option) - its much simpler. Hopefully FiiO will do more to unlock the USB out eventually. In the meantime, the Q1 Mkii is definitely working.
Regarding gapless on lossless files, i can confirm that it works. As you rightly pointed out it is still work in progress on lossy files. All in all a decent FW update.