I think I noticed the same change in my feed as well, but it's part of a lot of small changes over the past few years that have in general reduced the enjoyment I got from FB to the point where I deleted the apps from my phones and quit using it entirely. I've kept my account active because it's useful for getting in contact with people when I need to, but I never look at FB anymore without a very specific reason for doing so, and I leave as soon as I'm done.