If there were 2 things I'd REALLY like to see in Vegas 4, they would be these:

1. Volume envelopes for Busses. I believe this is being implemented for Acid 4 and probably (hopefully) already in the works for Vegas.

2. Side chained FX: the ability to control an effect from another source (track) than the one it is processing. As in automated ducking, masking, etc...obviously I'm speaking of SF FX here.

DSG