Earlier quoted context omitted.
Sounds like echoes of the Gnome Shell critisicm... trying to be both tablet and desktop at once leads to neither side being very good.
People mostly hate change, and metro gnome shell and unity all represent that. Why did people like Engadget go from hating Vista to loving Vista SP1 aka Win7? They had gotten used to it and microsoft gave them a good excuse to change their minds. While gnome shell was a bit rougher around the edges as most dot oh open source projects tend to be, you'll emd up seeing the same behavior in n years when people will be sc…
If I'm not mistaken, the main reason for the Vista-hate was the too frequent UAC-prompt, buggy drivers and extreme slowness. This was generally resolved by Windows 7, and that's why I think they started praising it.
I don't think I heard many complaints about the "new" UI. Rather, if anything, people was saying it looked like XP with a new theme. That's not much to get used to over time as a previous XP-user.