Cormier really impressed me a lot last night. He made Silva look like a beginner and did whatever he wanted to. He totally dominated the stand up part and stopped the takedown attempts easily.
I think the finals will be more even than most people think. Of course, Barnett has the edge when it comes to experience and I'd give him a little advantage in stand up, but still Cormier will be the one who decides whether this fight lasts in stand up or ground. I don't think Barnett possesses enough power to take Cormier down just like that, but if he does so, then he's close to winning this whole GP.
Another thing which goes to Barnett's favour is condition. I believe he's got better cardio than Cormier, who usually gets tired after the first few minutes.
Overall, I'd give a slice advantage to Barnett, who's been my favorite in this GP since the very beginning.