for me it had work, and i doesn't have those blocking moster but quite nice OD at the bigs, which might be the other key then blocking for it(i even think OD is quite good for big also in man to man).
The downside of this tactic is, that it is definately not working when the opposition isn't playing inside while a 3-2 Zone isn't good against an inside attack but at least didn't screw you.