Where should issues with Google Play Services (e.g., fused location provider) be reported?
Then post your question where it's sure to be seen: googleplus help. That link is, after all, one of the few links the closed page offers with any actual developer interaction. I looked, and saw many questions were way off-topic, but the questioners were usually led to the right forum, or had their question answered. And you can always point back to the "closed forum" page you referenced as your reason for being there. You have a legitimate question; let them know that, the only way that seems possible!