What I can't understand, is that Danzig (like other urban maps) are very small, 3 objectives and it's all over, why can't the urban maps be larger?
well, its a ton of work for one. unlike a rural map, you cant just say, "hey, i'll just plop a 50,000,000 uu wheat field right here. ok......done and done."
for every new area you place in an urban map, you have to painstakingly design every single building and so on and so forth until you are so ready to die that you just give up.
secondly, maps perform badly when they have tons and tons of stuff in them. having a vast yet still marginally convincing urban landscape will kill pretty much anyone's machine, unless the mapper is a total optimization genius, which few are.
in short, making urban maps is a very, very challenging endeavor. trying to make them large enough to contain 5,6, 7 or 10 objectives is even more difficult.
i hate to say this, and i am not trying to tell you to shut up, but if you really want to experience what i am trying to say, take a couple of days to get accustomed to unreal editor and try to map even a single city block. its quite hard
but if you give it an honest shot, the RO community will gain a new level designer committed to introducing a new type of map, and that is always a good thing.