At this point, I personally don't care. They can do anything and I'll learn to use it. For everyone here; taking design too seriously can result in endless arguments. Design preference is really, totally subjective. Sure, I have read people post things that are genuinely thought-out and make sense, but I think everyone is being way too serious about this. Design is important, but there are things that are more important than pure looks.
I like the way WP8 is designed, and I also like the screenshots in that article. This is a big shift in the way Windows looks and while I understand how important it is for Windows 10 to 'get it right', I feel like design is one of the last things that people consider. I mean just look at Samsung phones, they sell by the millions and yet that UI is ugly as sin. Even settings app up to KitKat was abhorrent. But people buy them because they get the job done.
Don't worry about it people. There is a lot of stuff that W10 is getting right. I forgive them even if design isn't one of them.