As I said its only a consensus, however I do feel that we need to balance out 50 50 on the maps we play, For those of us who enjoy barricade maps more than escape maps, and visa versa it seems to be either one or the other more often than a mix of both.
For example this morning the zombie mod has been on escape maps since like 9:00 this morning till bout 2:30 in the afternoon. I think having it setup where there is 3 escape maps, and then 3 barricade maps or every map change switches from ze To zm.