I suspect it would be easier to just make a mirror image of the existing front side - vestibule, door and all, like in the Lunar Duo - rather than re-design something different. I'm guessing Ron has already investigated and discarded that idea, along with a few more none of us have thought about, before he settled on the final product design. Could we see that or something else in a future revision?....... possibly.
However, bear in mind the targeted market here. Ron seems to be aiming for the lightest two person tent and to that end (as stated in the product decription), "To achieve its phenomenal 27 ounce weight for a two person tent, we've stripped out everything not absolutely needed".
I can think of a few additions or changes I'd like to see in my Lunar Solo too, but it's not reasonable to expect SMD to become a custom shop.