Yes, please add this. Working properly with DACs is a major feature for me. I've only taken in interest in the new build due to better DAC support (I am buying a new one soon).
It would be frustrating have to restart everything if my portable DAC gets disconnected for some reason (on purpose or accident)
I'm not fussed about whether it only outputs in 16bit files through Poweramp due to not integrating the same way "USB Audio Player Pro" does, but I would appreciate minimal hassle DAC use like in the older versions of android. I have been using Poweramp for many years and I really