The new composite rules are slick.
So far, we have created three provider rules: local Host Discovery, AD Discovery, and Privilege Escalation.
We have two consumer rules, one for the two discovery provider rules and one for all three providers.
I did find that we can't use the command history in the provider rules. This could be due to the complexity of these discovery rules. They do work very well off on the process command field, though.
One issue that I see very quickly, though, is the lack of rule management functionality. The flat file type structure within the SIEM makes it difficult to understand any rule groupings that are created. Are there any plans to address this?