While I'm not a big fan of Final Cut, I do have to use it at work and there are a couple things that I really like about it.
The biggest thing is that you can arrange multicam angles in a vertical orientation.
It's wonderful and something that I'm surprised pretty much no one else can do.
If you work with 4 or 9 cameras, a normal grid-based system works fine, but if you work with 3 or 5 (especially 5, since there is so much wasted room), having more arrangement options would be great.
Given that Vegas touts it's configurability so much, this would seem like a great addition.

JJ