looking better. Its mainly your grayish white colour texture that is making it look odd in some places I think. I would try and go for a slightly darker texture and see what that is like.
I would also look into going about adding some damage to some of your bricks etc. I've found a really easy and effective way of doing this is by using the chamfer tool on the edges and corners (ie, on individual verts) of bricks and it can make the edges look so much more natrual
This aint the best example but on the corner of this wall support for my afghan bridge you can just see some corners that I've done this too:
If you went over many of your bricks on your buildings, epically the ones on the roof and your archways you would really add some detail in there. Just dont go overboard as this will eat up a bunch of polys.
Also on the bottom support of your archway, looks like your stone texture is a bit warped on that angle bit.