There is a need for standardization of modeling for Statistical STA, though that whole technology is not well understood. It may be too early to standardize!
It would be great to settle the CCS vs. ECSM divide, however. These are essentially the same modeling approach, yet defined differently by Synopsys vs. Cadence/Magma, respectively.
I have sympathies for Si2 in trying to forge these standards across EDA companies. I was more involved in the days of Liberty, DCL/DCM, and ALF standardization, and it was very hard to get cooperation across all EDA vendors. They see Standards as an area to maneuver for competitive advantage.