GMF is still awful
Today we had a GMF workshop at a customer (I was a participant, not the presenter). And I have to say I am still seriously underwhelmed by GMF ... I hadn't looked at it for a year or so. It is still basically unusable: awful editors, bad diagnostics and a lot of duplication.
Obviously, having a tool for defining graphical editors is a good thing. However, I think GMF really fails at delivering. It is too low level, and too brittle.
I wonder when somebody will build a decent (textual) language that supports simple creation of (GMF-based) graphical editors. York's Epsilon Eugenia is a step in the right direction.