I think the 2013 certainly improved its "high water mark". The video about Ford using 285 rear tires was very inspiring, It seems like for the first time Ford looked at their engine out and said, Okay we make 650hp how are we going to put it to the ground. Do I think 650 is necessary? No, IMO 550 is more than enough, I would have like too see them continue to focus on suspension and getting the weight down.