My key arrived this morning, plays a lot like generals, but missing some pretty annoying things (no group select, no zoom to minimap etc) that make it frustrating to play. AI still needs a lot of work as well. Interestingly enough its using frostbite 3 - i.e. the same engine as BF4. Didn't notice any particular performance issues, but then I didn't have fraps on to see if they were doing the usual framerate cap.