In my opinion, the stamping seems to be too hard. IMO, maps should be stamped quicker and stay in beta longer. Some this doesn't work, like graphics and final forge and xml but this would really help with gameplay. The graphics, could be a little easier. For example, Das Schollass, Trafalger, and Iron curtain, IMHO deserve graphics stamps. I think the stamps would be better if they were used more as checkpoints, so the graphics or gameplay don't need to be perfect, but they need to be almost there. The final products would not need to change, but there should be slightly eaiser stamping, and then more of the nitpicking could go on in the Final Forge.
Just my suggestion to improve things a little.