Royce IS 3.0
Most of the fans/fighters I know wouldn't agree, and I would certainly count myself among them.
With Royce, the question has always been who he's training with and how. My understanding is that he is not training with people who are at his level (or better) and as a result he's not improving or evolving as a fighter.
In contrast, Hughes was training with folks who were as good as he was, if not better, at Miletich's.