The legendary map makes it return to the Active Duty map pool in place of Cobblestone, accompanied by some other minor changes in the update.
The map pool change goes live on 4/20/2018, with the title "Smoke Mid Every Day" Valve reintroduced Dust2 to the map pool and announced that it would be used for the upcoming FACEIT Major in London.
Cobblestone was moved into the "Defusal Group Delta" casual map group, and will still be playable in different game modes. As of now, it remains to be seen how different tournament organizers will react to this news and when Dust2 will be added to their tournament map pools.
Alongside with the biggest change, Valve have added Nuke to the Wingman mode and fixed a bug that was impacting server performance.
You can find the full patch notes below: