Hmm, the snow looks very flat and scratchy. I also think the stones inside the walls should pop out more when there's snow on it. If you can put the tileset table here I will see what I can do with it.

Save as png next time because Jpegs are awful for JJ2, especially if I'm trying to get a good look at the tileset. I guess you saved by it as accident.

The reason the lone brick looks so awkward is due to how flat it looks, considering the tileset seems to be going for a somewhat isometric look. Also, the outlines are too thick compared to the rest of the tileset. But since that screenshot is a bit older, it may have been changed since then.