Yeah, we know you hate Brock Lesnar. Get over it. He's a beast and the best of the UFC HW division*. Period.
(*Not the most skilled, but big enough, powerful enough, fast enough and with very high-level wrestling. He's too much for 99% of the heavyweights in the world - and he's only getting better. You're going to have to come to grips with that.)
Ducking Shane Carwin...
You do realize that Carwin is a smaller, less skilled vanilla version of Lesnar, without the ability to elicit any response (or generate money) from the hardcore or mainstream fans, right?
MMA is a business. The only way to get better fighters in MMA is to ensure they get paid. The only way to get paydays is to provide entertainment and draw attention - Brock does that in spades - he learned from the master, Vince McMahon. Lesnar (unwittingly) is building up the sport financially to make it worthwhile for the next generation of elite athletes to come in make a great living doing what they love and are good at.