The latest update for Call of Duty: Modern Warfare will make a few important changes to the game including more changes to the Hardcore multiplayer mode as well.
One of the major upgrades includes removing all night maps from Hardcore modes. They did not say if this is going to be a permanent thing or just temporary.
While they did remove some features, they also added more content back to the game including Shoot House 24/7 which will replace Crash 24/7. Docks will also be returning to the Gunfight map rotation while Grazna Raid will be added to the Hardcore Team Death Match and Arklov Peak.
The developer has already released the full patch notes for the update so you can check that out and see what other changes were made with the latest update.