@MasterPie: Yep, it's mostly small changes that would make a really large difference. It's not just affordances, though. The "edge UI" concept isn't bad, but there has to take into consideration mouse usage in scenarios where Fitt's law doesn't work. Multi-monitor and windowed remote sessions both suffer VERY badly here. A simple solution would be a "button" similar to the Win7 "show desktop" button. Relatively small, unobtrusive, but it gives the necessary visual cues and gives you a hit target large enough for mouse usage in these situations. I expect (read "hope for") these small sort of UI fixes in Blue.
@wkempf - I agree, I think you stated this very well.
I also am using Start8. I really like it. It sounds silly but it's really made a huge difference for me navigating as I work throughout the day. Back on the UI modification thread, I also tried their trial for Fences (since I live on my desktop) and I wish I would have found it years ago. Since it was only $9 I bought a copy earlier today. Love it.