They also degraded the interface so that the posts that once would be found via normal searching now aren't anymore. After the removal of the discussion filter, searches for X started returning more sites selling X than forums talking about X.

https://www.reddit.com/r/google/comments/2b54ux/google_compl...

There was a thread on Google forums about that, and I recall many upset users asking for the option to be reactivated, but (the irony) that discussion was removed as well.