You underestimate engagement. I guess most of these users already has a Google + profile, but are not engaged. By integrating both services (specially the old

You underestimate engagement. I guess most of these users already has a Google + profile, but are not engaged. By integrating both services (specially the old social features from reader) they could make Google + a much more active community, overnight. Instead, they decided to send their users to other venues. This is just dumb.