Today's update includes several community maps, a rearranging of casual and deathmatch map groups, and the introduction of weekly missions! Weekly Missions Your mission, should you choose to accept it, can be completed for bonus XP. Each week you'll get a new mission, and you can access your mission in the Main Menu and in the Play Menu.
I mean, in this case it was a complete technical overhaul. Graphically and technically, its much more flexable and more modern.
It is an Overwatch 2 situation in that it had most of its content removed compared to CS:GO though.