I am not saying it is not important. I am saying that this is beta software, it has not been released yet. They have plenty of time to change the UX. Maybe right now they have opted to focus on Edge for the present build. You act as if it is cut and dry and it can't possibly be addressed before release.
While the previews are building a demand for the OS, it is primarily for feedback purposes, not advertising purposes.
I agree, the little UX items, while a big deal can be some simple coding changes, right now they want to test stability. When one thing seems to be solid they cement it in. I would rather have Continuum work seamlessly then have fancy colors. Obviously we should have both, but I can tell you from being involved in betas with MS for years, toward the end things can change rapidly and dramatically on the UX front, windows 7 was this way.