I think one issue I see on Facebook is, it went from being very personal, to just being a mix of other social media norms. Which adds noise. If Facebook had a "Show me only relevant personal things" timeline, I'd use it. They used to let you define a custom timeline, where you group x number of friends, it was much nicer than the standard since I could weed out people depending on what type of content I wanted. I've stopped using FB for a while now though.