Huh? Out of all maps I find urban ones to be the easiest for OKW by far. Maybe it's because I play Feuersturm a lot.
Stg44s, incendiary grenades to deny garrisons, a forward Opel behind a house paired with flamethrowers and LeIg incendiary barrage if needed... it just works like a charm on these maps.
I find huge open maps to often be a struggle for OKW, especially the rather tight ones, cuz they're heaven for Pathfinder blob, maxim spam and section blobs.
Well he said non-doc. I prefer overwatch and scavenge myself so that's probably why I stay away.