Microsoft have just made available the new Exchange 2013 MP for SCOM. The big news with this MP is that the Microsoft Exchange Correlation Service that was present in the Exchange 2010 MP is now no more!
I haven't had a chance to give this a good test run (that chance should come next week hopefully), but for now, you can take a look at the official TechNet Blog Post on the release here:
The technical documentation for the MP can be reviewed here:
Finally, download the MP here:
Microsoft are always interested in peoples feedback on their MP's so if you have any 'constructive' feedback to give, add a comment to this post and I'll pass it onto the team who've developed it.