Thing is, though, the outcome you get is largely determined by how you fight. In real MMA, with those tiny gloves, it's usually not a good idea to trade strikes. There's a good chance someone will get caught. That's why you see actual fighters spend the majority of their time outside of range. They'll usually circle away from their opponent's power, only dart into range with the intention of throwing something, and when they do throw something it's usually quick strikes in short combinations. You just don't see guys stand toe-to-toe throwing superman punches and head kicks all the time, and it should as no surprise that if two guys do that in UFC Undisputed, someone's gonna get caught.
Furthermore, I'm not sure a single guy in that tournament ever blocked a single transition while on the ground. Much like when they were on the feet, when they went to the ground, the fight consisted of trying to get in as much damage as possible as quickly as possible. In an actual fight, fighters are more concerned with keeping a good position on the ground, mixing in strikes with effective grappling, and only going all-out when there's some notable advantage. In the Gamespot tournament, the ground fighting consisted almost solely of how much damage the guy on top could do before the guy on bottom did a transition to get to his feet. That's just sloppy.
If there's a complaint to be leveled in this regard towards UFC Undisputed, it's that it doesn't force to fight a smart fight, I guess. If you want to fight a sloppy MMA fight, you can. The game doesn't magically force you to fight a smart fighta any more than any other fighting game in the history of the world has forced someone to fight a smart fight.