I'm not sure how you can say if they're broadly unpopular - certainly you mostly hear complaints but that could be because the only people bothered enough to write about it are the ones who don't like it.

I'm personally a happy user and like almost all the changes they've made over the last few years. I like the new UI. I haven't felt the need to post anywhere about being roughly content with it.

The market share stats looked bad long before they started messing with the UI, no?