I think you shadows are a little harsh. My advise is standardize on an intensity of 75% or lower, and then hit them with a Gaussian blur of 1 pixel or more (depending on the scale you're working in). If you look at your building, the cathedral has a dark black shadow. Most of the other casters, buildings and trees alike, have a gentler shade. They are all too sharp though.

I've been working on a castle project that is meant to showcase shadow technique. It isn't a tutorial though I may circle around and hit that at some point. Take a look and see if this helps at all.

http://www.cartographersguild.com/sh...astle-Keep-WIP

My original hand-shaded project is Siete Torres, the one that I won a gold compass for. You'll be able to figure out a lot of the technique just by looking at that one. Rep to you for your efforts and for bringing back a lot of fond memories of days spent on games from Tactics II to Squad Leader.