Actually, Berkhan (and I) preach *better looking* body and all other aspects flowing from that. I agree with his emphasis on aesthetics, rather than performance, as aesthetics is the easiest variable to control. All you have to do is shed a little fat and build a little muscle. And if you pare down the subcutaneous fat, it doesn't take a lot of muscle to look muscular.
Another strength of the aesthetics approach is that it is easier to control the way you look than it is to ensure good health. That said, when you reduce fat, your health markers generally improve, for what that's worth.