BJJ does train control just fine. Are you saying it doesn't? BJJers in MMA don't think BJJ is all you need, that is why they train wrestling takedowns too. That is exactly what this entire thread is about. MMA fighters who train BJJ don't necessarily need to be wasting their time practicing how to hold a guy down. They learn control in their BJJ training, and the control they learn is better for MMA than wrestling is.
GSP isn't a great wrestler. He has very explosive takedowns, and he has great control. He trains BJJ with the best in the world. How many submissions have GSP had in the last couple years? How many has he even gone for? Very few. He uses his BJJ for control and position. Guys like Maia don't need to train how to hold a guy down in wrestling. They have the best control in the world. They need to work their takedowns, that is all.
There is no point in training how to pin a guy, if you can't get the guy to the ground. That is just stupid.