dude it takes a LOT more skill than you think...
lesnar is def not just "mauling"
True, he is not just that, but that is basically all it took for him to get Mir to the ground in the first match. That was all size and brute strength. He simply overpowered him in that first take down.
In his fight with Heath Herring, Brock's skill was definitely on display. Brock's strength will allow him to beat more skilled opponents.