So does anyone know what happened to the double xp weekends? i really miss them… especially for Warzone 
It was for the halo celebration of Summer event. It only comes back for new playlists/certain holiday weekends
They still have them, although only for the featured playlists. The “every playlist” double xp was a summer event. This most recent double xp was for Shotty Snipes.
I heard a rumor they were halved.
They should bring it back during the holiday season.