I just picked up the City of Suffering DLC.  It added Myrkon to the Starmap Special Locations on the Mission Deployment screen.

However it dropped the Maelstrom of Carnage location off of this menu.  No every time I want to do Maelstrom of Carnage I have to manually go to it through the standard starmap interface. 

This is rather annoying.  The Starmap Special Locations list should either be expanded or changed to show the 5 most recent locations gone to.