I believe Mark Hunt is actually still getting better. He's extremely technical though he doesn't really look it if you're not paying attention. His striking has gotten more dynamic and diverse. He's still a puncher but he's setting things up better, moving his head nice, throws creative combos that usually find their mark. You saw his TDD too. He was sprawling Werdum's takedowns.
Everyone can get caught. In a rematch, Mark Hunt is still 50/50 against Werdum IMO.