I remember you from IT, and I've always loved reading your posts because you're so detailed and.. to the point!
Anyway, I agree with you 100% on this. I can't get the perfect length, width or height either. I was fiddling around, trying to make a skinny-ish character, but very tall one, and I couldn't do it because as you said ,the other sliders move as well.
I was trying to make a pitbull with the wolf, well, I can't do that either.. haven't tried fiddling around with the feline mesh, but i can probably come way closer to looking like one then the canine mesh. The face is too.. pointy.. pitbulls have rounded faces, like most of the dogs in the pictures you provided.
Ah.. anyway..
yup, i agree with you
~Aroxy