I know this is a huge request (and will most likely need both mod tools and the ability to add more players to co-op than 4) but when someone told me there were no doors I was crushed. I know it sounds simple, but to me at least doors were an extremely important part of GR1 co-op.
While anticipating GRAW I didnt even give them a second thought because I could not think of a single reason why they would not be there. I am the main grenadier for my co-op group and the lack of doors reduces my effective usefullness to my group signifigantly. Not only that, it makes it feel like alot of map space is rendered completely useless. Im not talking about making every door have the ability to be opened/closed but there should at least be a good number that are. The game is incomplete without them, especially in urban settings.
I read the bit about too many doors making the map an impossible maze too. Unfortunately Id have to say that while that may be the case, I dont think it is a reasonable excuse. Thats part of urban warfare if I understand correctly. And as far as gameplay goes the more map area that is accessible, the more fun I have. For a game targeting the elite GR community (lack of something similar to GR1 training mission for example) I really dont see navigational problems as something that would be a let-down...