As AceCombat said, it's control. Rashad had a better position and is offering at least some offense. When Thiago was on his back, what the hell was he doing? He was standing up and that's it. And obviously Thiago did more damage, but that's NOT how UFC fights are scored. They're scored on a round-to-round basis and Rashad controlled rounds 1 and 2 while Thiago did nothing. It's not so much that takedowns are over-valued, it's the control aspect that many feel can be over-valued. The scoring system in general is very flawed.