I think the ‘freeze track states’ would be useful on the main fader page for things like cleaning and preventing accidental changes to the mix.
However, I think this can be taken a step further with a ‘Lock mixer’ function. This would be on the main page and would require a password to unlock. Before locking, the user can be asked if they want the mix to be muted or remain as it is.
I really like your idea of freeing track states without muting them, I hope they implement it in an update.
Best,
Crossly