Well, I think as long as you're making this a creation of your own, you might as well gloss over some of the follies of the original FF artists.
Unless you're an originalist, of course, and then you can leave it be xD
To me the most annoying thing about those tiles is the cobblestone roads... they look messy, and the jump from flat black to a neutral gray makes them look quite odd. I feel like they don't match up with the rest of the image.
Other than that, cool beans.