There are 3 major reasons why UFC is where it is right now after Zuffa bought them:
 Getting re-sanctioned in NSAC
 Spike TV deal
 Ultimate Fighter
All 3 were done by Lorenzo Fertita and not Dana White. Worst of all, the biggest reason UFC took off is because of the ultimate fighter and Dana was fully against doing it. It was Lorenzo who was all for it and finished the deal.
Dana White definitely gets too much credit for being the public figure of the UFC. He surely deserves credit given that he did work his butt off helping the UFC but let's not push it.