I don't believe that these features are merely missing, sadly. I believe that these features (with the exception of Multicam, which I can't imagine not being supported sooner or later) are indicative of a change in direction, away from an already crowded, competitive, and rapidly evolving market, and towards strengthening the Apple-centric universe of content delivery and consumption.
Look at what FCPX is - it's a wonderful tool for producing content for iOS devices and the web. Look at what FCPX isn't - compatible in any way, shape, or form with pre-existing workflows or SMPTE standards.
FCS 3 was a hodgepodge of different software designed by different companies, all relying on a 12-year old 32-bit framework for media management and convoluted procedures for roundtripping content amongst the applications. Likewise, the AV Foundation framework used in iOS, Lion, and, indeed, FCPX and QTX, and is hardware-optimized for very specific formats (in stark contrast to, say, Flash). And at the same time, Apple has very little incentive to drive content away from an iTunes-centric cycle of media consumption.
Apple is battling for web supremacy, now - with Google dropping H.264 support for Chrome, Apple refusing to add WebM support for Safari (*edit: it seems I'm mistaken here), and Adobe struggling to keep Flash alive in an HTML5 / iOS-compatible world... I mean, Apple is trying to do away with every sort of non-cloud-based format, be it a DVD for your software installation, a Blu-Ray for your Apple TV, a cd for your... anything, and, apparently, a tape to traffic your spot or submit your film. Apple wants your TV to come through the internet, your music on the cloud, your movies rentable on iTunes, and they want to endorse content that will drive their eco-system.
If Apple releases DVD Studio Pro 5, I'll eat my shoe. I'll be equally surprised if they don't EOL Color either, there's no use in continuing to support standards for an industry you're ultimately competing with. Avid, Blackmagic, Autodesk, Iridas, and so forth can concern themselves with that... if they'll even run on Lion.
And, to that end, why even make Mac Pros anymore? All they do is provide pesky choices. With an iMac and Thunderbolt, you have your display built right-in and your graphics card options quite limited - Apple can "automatically gamma correct" whatever they want, so long as it looks best on an Apple device.