I guess that looking at CroCop recent fight against Santos i cant say he put on a bad performance.
By looking at is older fights in Pride i say he was quit the same, except that in Pride most fighter feared is stand up and would not engage with him.
What i can see with the new breed of fighters is that they use a lot more angles, clinch and knees then before.
2 fighter that come in mind is GSP and Anderson Silva who keep getting better with every fight.
Also fighters are getting better at studying there opponants and i guess that does make a big difference.
I am very curious to see where MMA will be in 10 years and to say that Vince McMahon said it would bankrupt.