Thing is that Potential =/= Skill. Yeah, theres a chance at some point he'll have excellent skills but at this point they aren't anything fantastic. JDS, Cain etc have skills NOW. I fully believe Cain would beat Overeem. JDS would give him a fight, but I couldn't pick a winner at this moment. The reason Cain beats him is because of his wrestling more than his striking.
Im not sure if you're referring to Ben Edwards here or Overeem lol? I was saying Edwards has a tonne of potnential.