This is probably happening already. The feed itself is no longer sorted by date (you get some highlights that you can dismiss but hey, here they are again), and then even content liked (not retweeted) by people you follow shows up. This makes absolutely no sense for the user, as it happens on Facebook. I assume it's a way to tackle the lack of original content generated from individual users / content consumers (e.g. friends you follow).
this is an elephant in the room. most people simply do not produce any useful content. they just auto tweet links or comment on something random and specific that is uninteresting.
