Hope I'm not duplicating anything.
#1. PDC button in Control Bar - to create a vip lane for monitoring through Sonar.
Lifesaver when needing to record something late in mixing process.
Gobal bypass is up there too.
#2. Dim on Solo - to not flood phones with more than you need for a take.
#3. Track templates - yet another lifesaver.
Multimike setup in a flash, full setup of brass section with busses and all.
There is no limit what you can use it for.