Symphony is a useless lift. The only worthwhile terrain accessed is Flute, which you can get to without Symphony by sidestepping for a minute then skating along the cat track.
7th Heaven, the actual terrain you can lap from the lift is rocky crap at the top followed by flat trees (Reservoir Trees are ok but short), Chainsaw I would not consider 7th Heaven. Anything good off Blackcomb peak you need to hike/tour to and is not inbounds anyway.
Awesome last few days at WB, no crowds either (yet). And man, TONS of idiot Japanese snowboarders in Khyber, it gets destroyed first lap almost now, sad really, need more people getting lost and skiing down to Function to scare up some fear.