Well, thank you all... (I was expecting some heavy "that looks like s**t", so I feel like a burden was taken off my back now...)
About the Sandbags... We did a little research about the Battle of Berlin and the russian attack on the Reichstag... And, ok, if you overlook the fact that this is gonna be for Allied Assault, and it's gonna be allies attacking instead of russian, it seems that on the days before the attack, the germans prepared the building, expecting the offensive, turning it into a fortress by closing windows and entrances with brick wall (as you can see on some screenshots), setting up all kinds of traps, building concrete walls inside the building to use as cover (not yet implemented on the map) and, yes, sandbags... Good looking decoration was not in the "to do" list that week...
Anyways, we're not "realism-fans" either... Since we messed history up from the beginning with allies attacking instead of russians, "realism" is now a very flexible concept... Right now, we're trashing the real blueprints of the bunker under the Reichstag and applying, instead, Hitler's bunker blueprints...
The staircase may look a little bit like the one in Remagen... But that's not thieving... We prefer to think that we're "paying homage" to the guys at 2015...
Na... To be honest, I've never thought of that... What can I say? I'm no architect and, when it came to make those four lateral doors accesible, the "U-shaped" staircase was the first idea... Maybe I'll think of something more original in the future...
Again, thanks to all of you for the ego-boost and the motivation to keep on going...