The training is irrelevant, its what I've been trying to tell people for years now. It was the diet that changed his appearance, not the reps/sets or exercises he did.
If you train to get stronger and eat to get leaner, and do it with no f**k ups, you will improve your appearance.
Fact is Dan got weaker on the program he was doing, but getting stronger wasnt the goal. He measured at 8% body fat this week, but he is now back doing a pure powerlifting routine, has been for the past few weeks, hence why his lifts have skyrocketed, and his added calories have resulted in good weight gains.
Train for strength eat for lean. Its been done that way for decades.
For those of you that still think there is a magic routine, Dan squatted, benched, inclined, deadlifted, seated pressed, leg pressed, skull crushed, curled, dipped. He pretty much went to failure each set. There was lots of volume and he trained around 4 days a week.