After using the update for a week,I can say I love the new PRV especailly the new toggle track filter.
One thing though,can you add a one-click knob to toggle those track in use(with midi note or cc etc.).
Maybe track manager too,as it's quite useful and DAW like Cubase have this function for a long long time.
BTW...I still can't tell why audio track keep showing in PRV.