Maybe because the average human is inherently lazy and doesn't want to re-learn how to use the new UI? Or maybe because the average human is pleased when something does never change? Or, maybe, because the average human loves being a whiner? :)

Notable complaints: beacon, ToS, this. Beacon was a terrible idea. They shouldn't have backed down from the ToS because it would have blown over. 'this' remains to be seen.

I had no problem with the ToS, 'this' I have a problem with, the feel is awkward and now it feels a lot more awkward and cluttered.

I think facebook's main problem is that they could gradually make changes, piece by piece and no one would ever really notice. Yet they change the entire home page and you get reactions like this because the feel is drastically different.

This isn't notable. There are always redesign changes. This is just the first major redesign happening at a time when the tech world thinks hating Facebook is fashionable, so it's echoing more.