contra was a popular map even when the server was thriving i think it should be added back to the rotation.
i wish people took the time to learn strata… its a great map. but i realize it kills the server 
a suggestion… instead of having d2 rotate so many times, why dont you make it like d2 and inferno, or even chateau too… those maps always fill the server. and then people wont get tired of dust 2 as easily, just a thought.