I still find issues with audio in 8. The volume and mute keys not doing anything even though windows is shows the volume going up and down. This seems to be tied to the HTLM5 redirected stuff though. Work around is just use the volume controls in sites like YouTube instead.

The bigger issue we are running into is if you use Laptops as your terminal. We have discovered that if you undock a laptop while on Horizon and then dock back up, Teams will no longer work with your audio devices. It will refuse to pickup or connect to meetings till you completely close the Horizon Client and then relaunch it on the laptop. You don't have to restart your VDI machine. This seems to "unstuck" the audio hooks built into the Horizon Client for Teams and lets Teams behave as expected. I REALY miss S4B.... it worked SOOO much better in VDI.