SPOILERS
I must say with my fairly weak understanding of MMA, this fight underscored for me how underdeveloped the entire (super)heavyweight division is.
In Carwin you had one of only a guys even large enough to be a challenge to a very raw brock lesnar who is fairly new to the sport. He is bulky to the extent that he had nowhere near the cardio required to do anything after utterly destroying Brock in the first round. Then, on the other side of things, you've Brock, who had absolutely no defense, who turtled and fell back like an amateur boxer the second he met with a guy with punching power in his weight class. It's all just very sloppy.
So Cain Velasquez next for Brock. A better technical striker by far, and has the endurance, but will give up many many pounds to Lesnar, and if Lesnar gets on top of him, even though he is far less skilled, you'd have to think it's over. If there was anyone close to Lesnar's size with the sort of ability we see in any of the other weight classes, he wouldn't be close to being HW champion. The middleweights, for instance, are several years more evolved and more deep than the real super heavyweights who are just massive lumbering oafs.
Very entertaining bloody staggering fights all round, but not a ton of skill on display, and to be honest, I don't like MMA as much when it's just very dirty boxing, because there's nothing to enjoy in the technical aspects of it. At any rate, the next event will probably be more boring for the super casual fan who likes haymakers, big guys and blood, but will feature far far better MMA.