I already read that thread, but most of the talk is about the geometry of the suspension itself (if you know what I mean) and toe-in vs. toe-out, and not much about the angle of the wheel compared to vertical.
Edit:
In this picture, if you made the upper yellow one a tad longer, and the lower yellow one slightly shorter (as in "more cut off than added on the top),
It seems to me, that having the contact area slightly more inwards would alleviate some of the tendency to bump stear. I mean, by lengthening the top portion, say, 20mm, and shortening the lower by 30 or 40mm or how much is needed to get from "minus vertical" over vertical to "plus vertical", the red line would be more vertical, and therefore the wheel going outwards at the top, and slightly inward at the bottom, making the contact area closer to the attachment point of the spring. A couple of centimeters there would mean a world of difference, I would think, hence me trying to solicit a discussion on the merits of the idea. I can't weld, so I can't test it. At least not cheaply, and I sure as hell don't know enough about this to just go for it.