Dunno how you can compare Munoz and Henderson. Munoz was a great wrestler but his wrestling in MMA has never been successful and has been taken down in nearly all of his fights.
People crap on Hendo's wrestling, mainly from Shields fight where he defended all takedowns until he gassed (which was 1 round admittedly). Hendo's wrestling is awesome, he basically only gets taken down when swinging for the fence or when he's gassed (Shogun, Shields). Only one to ever ragdoll Hendo like that was Cormier.
Rashad is one of the best wrestlers at LHW and he couldn't do **** to Hendo wrestling wise. You may say he took down Hendo once but Hendo had a wizard the whole time and was safe. The only reason it looked like a takedown was because he drove Hendo to the cage, but Hendo was still in a good spot with a wizard in. He stood up immediately. Hendo wasn't on his ass nor did Rashad have back control, Hendo was just squished against the cage.