Nope. Don't miss him at all, and this is coming from someone who is and was a fan of a lot of his work in the UFC.
I'm not a Brock hater at all.
But the fact is, once someone punched him in his mouth he realized real quick he didn't want to be a UFC fighter. His next few fights after that were him collecting a pay check and surrendering the moment someone stood up to him.
Given that is pretty much indisputable, there's nothing to miss. He was what he was. He came in, he did some things, he had some exciting fights, then he wilted, then he caved, now he's gone.