I think he looks better the way he does it, crunching down instaed of lifting up. Not every bodybuilder can do a "vacuum" I think Melving is the only pro hat can do thta pose of the curent top pros. For bodybuilders that can do the Vacuum, Haney, Arnold, Ray, etc it looks much better that way.
I agree that very few bodybuilders can do a "true" vacuum today - they simply take too many drugs to be able to.
However, by crunching down with the abs instead of holding them in and lifting the ribcage up, they miss out on showing a their torso size to it's maximum - especially the lats and serratus.
Narrow guys like phil and paco need that width illusion more than anyone.