That map looks pretty big. Are the two sections mirrors of one another? Sorry, I won't get a chance to play this map until later in the week, but by the looks of it, you have plenty of Z-axis fighting going on. I'm guessing that's required for crossbow battles.
If there's one thing that catches me off guard from the images, it has to be the lighting. It comes off as very bland if anything. There aren't any intersting shadows, and it's almost hard to tell where the foreground stops and the background begins. A sharp env. angle would do this map justice methinks. Perhaps play with a night theme maybe? -There could be bright lights from the inside? Food for thought I suppose.
Looks nice so far. -What are the raised bunkers for, what is the place?