Many people still just want their Bridges, Apartment and Barracks cycle. Next is that campaign servers have difficulties already to put the vast amount of maps in the territories at all. Also keep in mind that many maps are not in or around Stalingrad. A general Ostfront campaign map would be desirable. More territories and thus more maps.
Seems like there would be at least ONE server out there running old maps like kaukasus, that village one, etc. so many good old maps.