We let you know about the inbound November changes in the update a few weeks back, but if you were waiting on word that they went live, here it is. Word. If this is the first you've heard about it, here's the breakdown of the changes:
Ranked:
Team Slayer – All extra content optional (Includes Heroic, Legendary, Mythic, Mythic 2 and Cold Storage)
Team Throwback – Weighting on Valhalla, Standoff reduced. Weighting on Heretic, Citadel increased. The Pit replaced with Pit Stop.
MLG – Maps updated to MLG version 7. Guardian and Lockdown (Foundry) removed. Heretic added to Slayer, Oddball and CTF. MLG is now Halo 3: Mythic required.
Social:
Big Team Mythic – Removed.
7 on the 7th:
7 Player FFA on Cold Storage, Assembly, Heretic and Citadel. (Halo 3: Mythic required)
Double EXP Weekends (Listed in Order):
Grifball (Heroic/Mythic required)
Team Control (Halo 3: Mythic required)
Team Flag (Halo 3: Mythic required)
Social Living Dead (Halo 3: Mythic required)
For a handy-dandy, color-coded guide designed to clear up some confusion over which maps you need in what playlists, hit up
HBO.