Thats what I've been saying this whole time!
Why not both?
For casual playlist there can be: AAs, Sprint, Flinch, Loadouts
and for Ranked playlist there can be: No AAs, Descoping, No sprint, No loadouts
Although I think Personal Ordinance and Ordinance drops should stay in custom games.(We shouldn't remove them because they are fun to use they just ruin the flow of multiplayer matches.)
With those simple changes BOOM You got the golden triangle of Halo in Ranked playlist and the casual fun of Halo 4 in social playlist.