Well, a user reported previously that it worked on MultiPoint Server 2010 (which was based on Server 2008 R2):
http://sourceforge.net/p/classicshell/discussion/1049756/thread/14b5d26b/ Since MultiPoint Server 2012 is based on Server 2012 and only uses RDP, you could try if it works. I don't think anyone would have tested it but if the Explorer codebase is the same, then it *should* work, there is no reason it won't work unless the binaries and address spaces are different. Report here please if you do test it.

For the Shutdown menu, you might need to enable the option: "Show Shutdown during remote sessions"