"Users don't hate change, they hate arbitrary change that forces them to learn how to use your site again, or that removes features they enjoy." How does this

"Users don't hate change, they hate arbitrary change that forces them to learn how to use your site again, or that removes features they enjoy." How does this square with the overwhelmingly negative early responses to facebook's news feed, or reactions? Would you characterize them as "arbitrary"? I use those as examples because they now seem widely loved, so they seem like good (non-arbitrary) design to me, but they were poorly received.