i think the support by jetbrains in this forum is a bit weak.
I really like MPS, but there are certain points I need some help to get it working. But in this forum you dont get an answer in a week....
If no one of jetbrains feels responsible for providing support in this forum I will file a youtrack issue for that. I really would like some guys of jetbrains writing in this forum regularly.
EDIT: issue created: MPS-12542