Ok, i have few things here. Firstly, i think that the indoor areas could stand to be a bit brighter. Not much but a bit.
Secondly, i think some color would make the map a lot nicer. At the moment it has lot of brown textures, which makes it look a bit boring. Though the plants and lanterns spice the map up, i think it still needs some thing more. Maybe make some spots with dead grass texture (if there is one)?
1st and 2nd ss: Maybe make the floor on these areas with some kind of small tile. I took sshots from b1 how they could look. Would look nice and give the map more style.
3rd ss: A little lip on the ground-
4th ss: Little lips on the walls on both sides.
5th ss: Add barrel top texture.
6th and 7th ss: The wood texture is misaligned.
8th ss: The wall looks bad when it ends to sky.