I'm not sure how much we can read into intel being the reason 30 teams aren't signing him. He's not going to be an all-star. He's going to be a rotation defensive piece (what they tried to sell us on Exum being). The bigger issue here is fit -- we have a need and he's the kind of guy we need. If I'm the Bulls GM, I have no interest in buying wallpaper while I'm busy pouring a foundation. If I'm the Clippers I have a lot of guys who play perimeter defense and I have no need for a minimum guy from Chicago. If I'm Minnesota I know my team sucks and we have much bigger fish to fry. If I'm Miami, I've got a lot of guys who guard the perimeter, including my star player. If I'm New York, it's going to take a lot more than a defensive piece off the bench to put out the dumpster fire. If I'm the Lakers, I have the luxury of finding exactly who I want.
90% of the league doesn't need someone like Shaq. So to say 30 NBA teams know something is misleading. It's more a question of why aren't teams like Utah and Portland signing him. And the answer to the former is more complicated than saying there's a flaw with Shaq. It's because they're holding on to guys that they, for whatever reason, have valued higher. And if you don't think we have a track record of overvaluing our guys compared to other, better options around the league, then I'm not sure what to tell you.
This is 100% about fit.