Bring back the ball and Un-dead FUN

I’ve been meaning to play some Halo 3 lately, but because there’s no more Grifball and Living Dead, i been having a hard time doing so. I think 343 should have an update for Halo 3 and bring back all of the playlists no longer available, like Grifball and Living Dead. Do you think 343 should go back to Halo 3 and bring back ALL the playlists that got removed? And what the HEY, bring back Double XP weekends TOO! (not just because i am almost a Lieutenant in them, they are also fun). What do you think?