I am so glad that the System Center Operations Manager 2012 Release Candidate was recently released. This is an exciting release, and includes all of the new capabilities introduced in the Beta plus a few more.
One of the important changes we made with Operations Manager 2012 is that we have simplified the architecture by removing the RMS (Root Management Server) role. To do this, we have created resource pools that will distribute the workload that the RMS performed in the past. This will help decrease bottlenecks, help increase performance, and help provide higher availability of your Operations Manager environment.