Is this really news? The UFC HW division in paricular has been dominated by wrestlers since the mid 90s.
Guys like Munoz or Karem Gaber have shown that no matter what your wrestling pedigree is, you're not guaranteed to be a good MMA fighter, which is probably tougher for some people to swallow than the fact that guys with wrestling backgrounds can be successful.
Sure it's a great combination, but so is anything with wrestling because you can dictate where the fight goes.
the worst kept secret in mma is that wrestling is the best base for an mma fighter, i dont see that changing anytime soon.