This has been discussed before. Shane was dominant in the past because break rules favored overemphasis on the break in the "winning formula". With 4" pockets and break from the box, resulting in a random layout, SVB's dominance is nowhere near as assured. He has the occasional unexplainable miss creeping in, and he never played position as well as some other top pros, relying on his shotmaking to make up for it. That worked on 4 1/2" pockets. Not so much on 4". You can't keep getting thin on shots with 4" pockets and super slick tables.
As an example, Shane scratched in the side in important games in both matches he lost in Hanoi. With the ball path he took, the scratch was there all day long, every day, and twice on Sunday. I understand WHY he took the route, as he was trying to get closer to the ball he was playing position on, but the thing is... Fedor and Filler don't do that, as a general rule. They make SURE they have a shot, even if the ball is another three feet away, and they rely on fundamentals to take it home for the win.
I personally don't think the rules favor Shane going forward, even if he did find that motivation. IMHO, 4" pockets, less balls on the break, and a random layout don't favor Shane as much these days. There are much better shotmakers on tour, and his break can't be as dominant a part in matches as it used to be. Also, there are players both better at jumping and shotmaking than he is, so that is also a factor.
Keep in mind.. I am HOPING he continues to win. But I bet with my brain, not my heart. It's all well and good that he "goes deep" in most tournaments he plays, but when it comes down to it, it's those last 4-5 matches that really count, and really decide how much earnings you are gonna take home.