What I'd do with playlists:
--------------------------Ranked--------------------------
Team Arena (CTF, Strongholds, Slayer)
Slayer
Doubles
FFA
Swat (I actually think this should be social, ranked by likely community demand)
Developer Maps in Ranked Rotation:
Coliseum, Eden, Empire, Fathom, Mercy, Plaza, Regret, Stasis, The Rig, Truth, Tyrant
---------------------------Social----------------------------
Social Skirmish (CTF, Slayer, Assault, Ricochet, KoTH)
Team Snipers
Action Sack (Now including Infection)
Grifball
BTB
Rotational Weekend Playlist
Developer Maps in Social Rotation:
Coliseum, Eden, Empire, Fathom, Mercy, Molten, Overgrowth, Plaza, Regret, Riptide, Stasis, The Rig, Truth, Tyrant
--------------------------Warzone--------------------------
Warzone
Warzone Assault
Warzone Firefight (No skull modifiers, easier enemies, unlimited lives)
Warzone Firefight Mythic (Skull Modifiers, harder Enemies, limited lives per round)