I don't think "it" will get any more sophisticated. But the FIGHTERS will.
I still believe that to be the best MMA fighter you can be, you have to be a "master" of ONE discipline. Whether it be boxing, muay Thai, wrestling, jits, doesn't matter. Be a master of one and have a passable game within the others.
Koscheck is one example. He's a master of wrestling. His stand-up is ok and his jits is ok. But he excels in wrestling.
In my opinion, wrestling is the base. It doesn't matter HOW good your striking is if you can't stay on your feet. The better fighters are often those with exceptional wresting skills. That doesn't mean they're always wrestling as many are strikers (Chuck Liddell). But it means that they are capable of staying on their feet by out wrestling their opponents.
They didn't get this wrestling skill by doing MMA. They got it by wrestling (isolating the wrestling game).
IMO, NO ONE is going to be a top level MMA fighter without ever having worked his wrestling as a stand-alone (no pun intended) art. Same with BJJ, same with boxing, etc.
And as always, I could be wrong.