I agree completely. Rogan and Goldie would always tout him as this great kickboxer early during his UFC career, but I never really saw it. And once he figured out to wrestle a bit, all he did was use his strength and athleticism to pin guys against the cage. Of the Zuffa era UFC, he's also been the dirtiest fighter, holding the cage, grabbing opponents shorts, and numerous low blows. Good riddance.
Kongo is a very good kickboxer (and very accomplished and proven in that sport), his skills and style just don't translate well to MMA rules. Jack Slack wrote up a great analysis of the reasons for it here
Everybody good, plenty of slaves for my robot colony?