The way I'd set up playlists.
Team Slayer (Infinity Slayer is always an option, just to keep it from becoming it's own redundant playlist)
Team Swat (no perks/AA's, limited loadout options)
Team Snipers (no perks/AA's, limited loadout options)
Rumble Pit
Big Team Battle
Infinity Squad (5v5, mix of Slayer and Objective)
Team Hardcore (classic settings)
Multi Team
Team Objective (although that may be redundant of Team Hardcore)
Action Sack
Weekend playlists: (double xp)
Grifball
Living Dead
Each week, a random playlist is selected for double xp/jackpots.
I like your playlist breakdown recommendation, but you ALWAYS seem to miss Team Doubles.
I emphasized the text heavily because it's my favourite playlist of all time!