WCM is a very important area of SharePoint, its an expensive licence so the product should work as expected.
I think in this version Microsoft did a very good job, it's amazing what they've done in 3 years, not just in the WCM part but in the entire product.
About WCM there is a lot of improvements, the new ribbon makes life easier for content producers, for designers it's possible to controls what styles can be used on the RichTextEditor.
Has i said before SharePoint is compliant with WCAG acessibility guidelines http://www.w3.org/TR/WCAG/
Now it's easier to upload pictures to SharePoint, tags that are set in local images are also promoted to SharePoint. It's possible to use wiki pages in public sites with all the look and feel of the public site, and the free structure of the new wiki pages.
The Search Engine Fields now appears on page in edit mode.
There is a new Asset library and a new Media Player WebPart (Silverlight), now it's possible to streaming videos from the blob cache, the CQW (Content Query WebPart) has some new features like the PageFieldValue where it's possible to filter the content of the CQW using a the value of a field in the page.
A very bit improvement it the possibility to have different host headers for each site collection in one Web Application.
It's now possible to manage a site in any browser (IE, FireFox, Safari)
Now you can export publishing workflows and then reuse them in any site that you want, without the need for creating and filling for each site a new workflow.
The Incremental Content Deployment that gave so many headaches to a lot of SharePoint Administration now is more reliable with a better logging and diagnostics, it's now possible to use Point in time snapshots on SQL Enterprise also with more logging and diagnostics.
