I didn't say it was ignorance, although they are clearly ignorant to what users want. What I said is that it is arrogance on their part to believe they are showing us what we want to see. The fact that they changed that part of the app a while ago certainly doesn't make it any better. Facebook's app has always been an example of something that can't get out of its own way. Just keep it simple, that is all we want. In fact, I would bet if they surveyed x amount of casual Facebook users and asked if they wanted their News Feed to be in chronological order or in an order based on some blah blah blah algorithm the large majority would choose chronological. But let's face it, it's much easier to pepper a News Feed with ads when chronology is not apparent.