After unfollowing 90% of the people, I had a different problem. Facebook kept filling my news feed with "X liked this" or "X commented on this" from the remaining 10%. It seems that one of the goals of the news feed algorithm is to make sure that you are always seeing new content. This became really annoying really fast. So I ended up unfollowing 100% of my friends, than created a group containing the ones that I really cared about. Now my news feed is practically empty. It takes me one extra click/touch to get to the new "feed". The benefit of doing this is that in the group feed there are no "X liked this" items, only posts by my friends or posts in which they were tagged. Of course, at any time FB can decide to change the group feeds to make them similar to the news feed, but for now this setup kind of works for me.