I personally don't think the mmc interface is one worth copying. There are many successful interfaces out there (compare the finesse of Virtual Center and how successfully it presents something terribly complex -- as opposed to SCOM or SCCM, that obscures the functionality and intuition of monitoring/alerting or confi mgt .
That being said, I agree with Jeff that deployment considerations need to be rolled into a centrally managed solution to be enterprise class. Achieving that will open doors for this software to new scales of adoption. That would be great for MMSoft and for us alike!