Detatch Host Timesync from A/V Sync
Currently ProTV has a "sync every X" functionality which will keep users synced to the host's playback position, but this is tied into the A/V system to maintain audio sync to the video. The reason that's an issue is this causes a notable blip in playback every time the A/V seek is performed to fix the audio sync, meaning you're typically going to want this disabled, negating the ability to keep check on host time sync.
I propose that AV auto sync be split out to AV sync and host time syncing separately as you will often want to enforce time sync with the host, but not at the cost of constant audio/video glitching (it's not really an issue when performing a manual resync via the button as that's forced and deliberate).