ALL of these look better than the back of Astro!!
Yes, I agree that having the screws accessible IS an advantage, but that should not mean that it couldn't be polished at least a bit... As it stands now, it looks like a phone the Borg (in Star Trek) would be proud of.
I certainly don't want them to postpone the delivery by months, or even weeks, to correct this, but it SHOULD have been something they already had looked into, and have a quick fix for. (In my view it is so CLEARLY that it looks terrible the way it is now, that they should have thought about it already.)
At least a better finish on the surface, or even some colour, would "solve" the problem quite easily...
And although all the "backs" you have provided pictures of already look better than the back of Astro, you have the "added problem" from Astro that it is designed to sit on a surface with the back VISIBLE to anyone sitting across from you when open, which clearly is NOT the situation with the "sliders" you have posted pictures of.
As I have stated before, I don't usually care much for esthetics, but that does not mean that I would like something that, in my view, is just plain ugly! At least not when it SHOULD be easy to rectify.