Comment 14 for bug 1711087

After you switch back to A2DP and the microphone is still available, does it keep the higher audio quality (even while running Skype) or does it degrade back to low quality? My understanding is that it would have to degrade, and that's probably not a bug.

If it doesn't degrade while using the mic then that's great. I have no idea how it's meant to work in that case. It might then be time to start talking to the experts and log the issue here:
  https://bugs.freedesktop.org/enter_bug.cgi?product=PulseAudio