The mixing console is a nice addition, that was missing for such an awesome audio app. And even though SF went multitrack, I find Vegas MUCH MORE useful for 95% of my audio needs. The fact I can stay 100% non-destructive to my original files and render out anything I want using full automation and plugin support is just awesome.
But, I'm surprised no one mentioned this (considering this is a taper's forum after all):
Support for opening and rendering FLAC files.
Now that is sweet. Full support for FLAC! Just drop flac files right into the timeline, edit them, and render back out to flac. WOW! Does any other non-destructive NLE do that? If you had a recorder that could record to flac, you could potentially stay 100% flac throughout your end-2-end workflow. Pretty neat!