Symantec Endpoint Protection 11 MR2 was finally released for download as of last weekend. If you've been fighting with SEP11 since it's release as I have, you may want to check it out.
I haven't had a chance to play with it, but the attached release announcement mentions many significant fixes. Unfortunately it does not mention anything about the extremely steep resource requirements that I have blogged about before. I'll post an update on the requirements as soon as I've had a chance to install it somewhere.