Big Gunns will stay out of this debate. He will say that on normal colored animals it is a lot harder to notice scarring, although it may in fact be there.
BG just wanted to comment on your Sig Crittervet. To answer your question. Yes BG would, if he liked the breed of dog and every single dog may or may not wobble no matter if the parents wobbled or not. Especially if this "wobble" did not interfere with the quality of life of the animal. They do breed Fainting Goats yah know.
BG gets what you're saying, but it's apples and oranges. Just like the Fainting Goat, this wobble gives Spiders a leeetle more personality. BG has heard of a couple that were so bad they would drown in the water bowl if not watched though. Although this could have been some combination of things that led them to get this bad.....who knows.