I don't know about that. I don't see anything wrong with Overeem not wanting to grapple with Werdum. He was actually doing very well striking. I think Overeem was pretty obviously worried about getting in close and played it very safe.
He was outstruck by Werdum. Werdum landed more shots and a lot of them looked very solid. He hit Overeem with some really good combinations. I know that he was able to do this in large part due to Overeem being afraid of being taken down by Werdum, but it is still the case. And his standup defence was shockingly bad. Werdum should not have been able to hit him flush in the head as many times as he did. Overeem seemed pretty content to just try and counter punch. He didn't really DO anything in the fight.
I thought Overeem's posing got pretty pathetic. Posing is somewhat justifiable when you are dominating your opponent. Jumping up from being on top of your opponent and running to a safe distance and flexing your muscles is not impressive. I get not wanting to grapple with Werdum but he should have tried to do something. Cain or dos Santos would have.
I think you have to give the decision to Overeem because of Werdum's playing possum tactics but Werdum's ability to hit Overeem in the head that many times impressed me way more than anything Overeem did in the fight. Both guys believed the hype of their opponent and were scared to fight their opponent's fight, but at least Werdum did some effective striking. Overeem didn't try anything when he was on top of Werdum.