The restrictive content in PTR encourages players to interact and communicate with each other during duels, which is very positive. This content is actually really fun and engaging, making the server feel vibrant and alive. Players watch, learn from each other, and try again. To me, this is a clear indication that this content should be implemented in future SoD, with incentives to duel in Durotar and Elwynn. I believe a duel system would be very well received. It feels like 2005 all over again.