I think a unified application is a bad idea. This would be like ditching the big roll around toolbox in favor of a Leatherman tool or Swiss Army Knife. Being all things to all people is always a compromise, and I don't really want to work with compromise tools, and can't really see how this would improve the workflow in a positive way.
If I'm doing Mograph work, I really don't want or need extensive sound and CC tools, or if I'm mixing I don't want the overhead, or clutter of editing, CC and DVD authoring tools also being open.
In the 'real world' most of these departments and operations would be physically located in separate rooms, for good reason. The FCP suite of aps should mimic the real world, and not merge them into one big noisy inefficient 'room'.
Scott Sheriff
Director
SST Digital Media
http://www.sstdigitalmedia.com