Ability to create collections either as WMI(WQL) or SQL based.
Back in the day Altiris had this ability to create collections based on SQL queries. I think this would be great as the provider in some cases work more effictiently and not need to do a translation if the query was already native. Not saying to get rid of WQL, but have the option to select sql based query and a text box to type or paste the SQL query.
From what I can see when running SQL traces, collection evaluations translate the WQL query into SQL anyway when it parses the database, so would only seem logical to use SQL based collection queries anyway. would certainly allow us to write better queries that are more performant.