The place where the current muting system is annoying is exclusively when page clusters are enabled and you are in gridtrack mode.
This new muting system should only come into effect for pages which have clustering enabled.
When clustering is enabled, send the mute/unmute to all pages in the cluster.
If you cluster 2 pages with different tracks muted, they would play as they are, but if you use gridtrack to set/unset a mute for a track, it would apply to all clustered pages.
This way, what you see in page mode would match what you see in gridtrack mode.
I hope this makes sense.
BTW, I found a related bug, in gridtrack mode, you cannot mute/unmute 2 tracks simultaneously, you must do it one at a time. In page mode, you can mute 2 tracks simultaneously.