Empire's Border: Win middle or lose. I'm not sure if there is another map that has such a singularly dominant location. Basically Thunderdome in about 20% of the map and if you aren't winning there then you lose. Not good map design.
Erlenberg: Amazingly it makes old Derpenberg seem good. Just too campy. Outside of the middle area along the river just about any aggressive move, or even just trying to get spots, will be severely punished.
Paris: Not as punishing as Empire's Border, but once again there is an area of importance that you need to win...the south. Middle is suicidal. I've seen successful pushes across the field but it is very rare. From the first time they showed this map it seemed clear that it would all be about winning south and that is how it has played out.