If a channel is 'on', a R-click now gives 3 options :
Mute - Solo - Mute on Transition.
It would be a logic addition to also have 'Solo on Transition' as a choice.
If a channel is 'off', a R-click gives 4 options :
Mute - Solo - Unmute All - Unmute on Transition
Here a nice addition would be 'Unmute All on Transition' (because maybe more channels are also 'off' at the moment).