He looks healthy now. He didn't look so healthy when he was Mr. O although he was impressively big as hell. He has a nice muscular fit look now. It's not like this is anything new. Nearly every top pro BBer loses quit a bit of weight when they stop competing. If they didn't they probably would make it past 55.
He's still pretty damn big. Why would he want to be at his max weight anymore if he's not competing? It takes way too much work/food/drugs to get there and stay at the size he was at before. Now he can still enjoy his time in the gym and live somewhat of a normal life.