Carwin is an incredibly dangerous opponent. But there is a difference between dangerous and talented. The bottomline is Carwin has come incredibly far in the MMA world on the basis of brutal knock out power and being very strong / quite athletic.
His MMA wrestling isnt particularly good, his attempt at a shot on Mir was actually pathetic.
His striking is quite bad - zero head movement or defence. He makes up for this by having God given, incredible one punch power (the best i have even seen personally).
Never seen his jits really, but that arm triangle from Brock could be seen coming from outer space and he just lay there.
His cardio is unspeakably poor.
I dont mean to rag on Shane - i class him as being in the top 5 Heavyweights in the world. But he just isnt very talented. You can never rule him out, but i suspect his loses might start piling up over the next year or 2.