OP updated. I THINK based on replies here there were two more event changes since the Nov 30th one soI edited it based on that. I probably wont update the OP here much longer as I imagine there arent many players left from the pre "fix" group amd new players should pop socialite their very first match...the lucky bastards lol.
Landed on exactly 500,000/500,000gs with exactly 18500 achievements and exactly 500 games. All 100% including DLC. Was going hard the first half of January to reach that goal! Finished it on 1-19-2016. Final achievement: Completion Serenity in Nero.