Much like the Jim Hettes vs. Alex Caceres fight, the first round was characterized by back and forth, indicating the two fighters were equally matched and lacked either finishing or positional control skills. Hamman, in particular, had difficulty keeping an advantage during scrambles or transitions. It also appears that whatever shortcomings C.B. Dollaway has, he's the more superior athlete of the two.
Commentator Joe Rogan noted Hamman's technical improvement and certainly that was on display, but tactically Hamman showed aggression and hard paces affect Dollaway more than the average UFC middleweight. It also demonstrates that unless Dollaway is taking advantage of openings in ground scrambles, he can be overwhelmed through sheer force of will.
The lesson is this: if fighters can use the standing portion of the game to hurt Dollaway (the dimension of the game where he is weakest), Dollaway's vaunted ground abilities distill down to defensive essentials.