The new ACR-as-a-filter is terrific, from my point of view, as are the additions to ACR itself (which are built into Lightroom 5 too, of course, so they're not necessarily a reason to upgrade to CC). I tend to agree about shake reduction -- it works reasonably well on some images, but you're still trying to make a silk purse out of a sow's ear. It's not going to make an exhibition-quality image out of a soft original.
One problem that tends to be a bit annoying with every release is that the marketing folks punch up the sexy (but not necessarily useful) stuff, and tend to ignore things that are really useful, such as the improvements in Select > Color Range and in Liquify. Sync settings is really useful if you work with different machines. I have a laptop for when I'm on the road, and being able to synch back and forth is handy.
I'm also happy about the improvements in typography, even if they don't really go far enough, but those wouldn't necessarily be of interest to photographers.