It wasn't so much of a disaster as a poorly-considered move.
Speaking of Pocket, the Pocket you see on the fresh Firefox instance often provided me interesting, enjoyable articles. I went to sign up -- keep this good stuff coming, I thought -- to learn that Pocket demanded the social element, requiring that I link up with other Pocket users to drive my feed. Yet it had done a great job without that, and now had turned completely stupid.
Which of course is by design to drive engagement, and it is absolutely obnoxious. Fuck social as a trend. If the only way a network gains users is by trying to make them pitchmen to other people, the network should die.