Aaarg... I just posted wrote a sizeable post but got timed out...
Still like the look of this map, and can't think of any gameplay flaws at the moment! Here is the brief version of my thoughts:
1. The outer green border still looks a bit pixelly, especially around Guildicciolo.
2. Is there any way you can make Chiesanuova look 'higher' than Fiorentino? This would help the marble stairs look less out of place.
3. Andy's got a point about the blending on the mountains. Perhaps you could just put a shadow falling to the right of them to soften that edge?
4. Did you ever try softening the bottom edge of te Torri?
5. As you've got 37 territories, it might be worth making Borgo Maggiore start neutral (the terr, not the region!). If anywhere is going to be neutral, I think that's the best place, and it would stop anybody starting with a +5 bonus for holding the region, or all the Torri.
Keep up the good work Ruben