Can't believe it's anywhere near GM time. Way too many bugs and inconsistencies in behavior. New networking tools in Server have to be implemented now that SMB is being canned - that's not a minor addition. Calling it a release candidate is a stretch, but calling it GM is just plain crazy.
The GPL3 issue with Samba has been around for a LONG time. The announcement was made in 2007. I have some feeling that Apple's been brewing their Samba replacement for a long time. (Although I don't think this is a GM either.)
About the only thing that I find disappointing about this release is the lack of a new filesystem. However, that might just be because coming from a Linux background I probably payed WAY more attention to filesystems than most people.