In priority order
- Matchmaking; search speed, playlist size, team equality, rank exploit, Stat bugs - killed most, killed most by, 1th place, “x won team brs” rather than “x team won team brs” (no improvements post update)
- all major Campaign issues (achievements, load freezes, coop issues, etc)
- Lobby/party transition bugs
- minor campaign bugs
- UI bugs
- general clean up (e.g custom game settings carry over game to game etc)
Once all of this is done, reset the ranks and release ranks for the other playlists.
Get it together, get those external developers back in and task them with fixing their problems.
Heck, get bungie in.