I don't think the OSCE has leverage in the region to continue negotiating with the parties. The European Union has achieved a lot of progress in mediating the conversation, mediating talks between Azerbaijan and Armenia. I believe that's the way both parties have seen it.
The Prague declaration last year brought Azerbaijan and Armenia to recognize their commitment to recognize each other's territorial integrity within their nationally recognized borders.
The European Union is the way to go, I believe, in that respect.