I stand by my research.
There is a logic to the updates thus far, and definitely a regular schedule. The curveball so far this year was 10.0.5- the Retina update was something no one predicted.
That said, in Larry's NAB blog post, he was told by Apple,
...the new architecture of the software, combined with the flexibility of the Mac App Store would allow for much more rapid updates to the program. However, while the releases were planned well in advance, there is no significance to the alternation of feature (10.0.1 and 10.0.3) with, essentially, bug fix (10.0.2 and 10.0.4) releases. In other words, don’t read too much into this alternating pattern of features and bug fixes.
The fact that 10.0.4 and 10.0.5 were both maintenance updates bears out Apple's statement. As well, it's clear now why the features they pre-announced at NAB were simply planned for "2012". But I'm going to hang whatever reputation I have on past action, and say that after 2 maintenance updates, a feature-rich update next followed by another maintenance update in the Fall is the most likely thing to expect for the rest of 2012.
If they push out another maintenance update with 10.0.6, OR if they push out 2 feature updates one after another this year, I'll have to reevaluate what I expect. And I'm happy to do that.
Until then, I'm sticking to my guns, and you guys have got it here in black and white if I'm wrong.
It's a fun game, regardless...
As a point of personal preference, I'm really hoping that a bunch of new functionality does come with the new release. I'm starting to be pulled into conversation with some of my clients about which way to turn after they leave FCP7. They may not make that call for another 6-12 months, but all the restored functionality will certainly make my case for FCPX better, especially in cases where there are other freelancers who are pushing them towards PremierPro.
I would say that FCPX's metadata-based Event structure demoes VERY well for clients. Masses of footage are easily organized, and that you can find the footage you're looking for with just a couple of search strings impresses. That said, I still with you could search keywords as a text string...