Most issues with pa steams from programs trying to communicate directly with alsa, this is the problem with Wine. Yes pa has a small delay but so does alsa and the entire kernel compared to implementing wine for bare metal. But the delay is sertenly not helped by wine insisting on only having an alsa driver and pa having to emulate the alsa interface to have wine work at the same time as everything else. I'm pretty sure QWET aslo speaks to alsa directly, but don't know how vlc works. But I generally don't have issues with audio over hdmi using pa.