Sonnen is a different fighter then Okami, with a different style of takedowns. To totally different fighters even on the ground for the most part. Sonnen's style may be OVER and that is good for the sport. If you watched the beginning fights that actually went a bit, three referees stood the action up FAR faster then they have in the past. One of them was Herb Dean. Dean is notorious for letting the action go. He almost NEVER steps in, and would allow all the lay and pray to go and let the full guard weak ass striking go. (That is what Sonnen did to Silva for 4.5 rounds) They where standing the guys up for NOT advancing there position. If this a new way of applying the rules it doesn't look good for guys like Sonnen and Okami. They will need to pass or get stood up. In my opinion, it is great for the sport and will change wagering a bit. Unless someone can find out if it was a change to the rules, and I'm sure the UFC is in favor if the change, we won't be sure for a few more events.
Before the match just for the hell of it, I watched the Silva/Sonnen fight again. In a few of the cases of the takedowns it was Silva pulling guard. Silva actually adjusted his style against the cage with his arm position to stop the judo throws of Okami. Sonnen uses lower leg takedowns and it is something I don't think that Silva handles well. The roids also likely aided Sonnen later in the fight. I actually think a rematch would be a much easier fight for Silva. The lower leg takedowns are dangerous as the knee to the chin is a definite possibly and can be fight ending. Mighty mouse is one of the best at the lower leg takedown and I think it will give Cruz fits when they fight in October. I'm tempted to bet Johnson at the huge plus odds but if the rules have changed it will hurt him as well. He gets the takedowns and does nothing.
About Silva fighting the guys you mentioned, it is not likely to happen. Silva would beat St. Pierre and likely easily, and Jones would likely beat the shit out of Silva. Silva's advantages are speed and reach. Jones is faster and would have a huge reach advantage. Any fight with Silva is fun to watch but I cannot see him at his age wanting those fights unless its for Millions.
We'll likely get to see Sonnen again if he beats Stann which I think is likely.