Maybe to get some more color and happier atmosphere, add some more of those classic woden shops like 'Cashmere' and 'The Villian'.
Add a whiskey shop, tourist shop, some pubs and etc.
Those woden structures match up with the natural stone real nice and gives it a authenthic scottish look. The wood can bring in some nice colors. The green wood with coper/gold details looks really authentic or perhaps red wood with gold letters and etc.
Spoiler
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[Blocked Image: https://thumbs.dreamstime.com/z/shops-royal-mile-edinburgh-scotland-scottish-s-amazing-old-town-many-wool-kilt-other-tourist-items-available-98701535.jpg][Blocked Image: http://www.placestoseeedinburgh.com/images4/clansofscotland.JPG][Blocked Image: https://iaininindia.files.wordpress.com/2012/09/dsc02620.jpg]
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This might be too much, but u can grab some ideas like the red building on the right:
[Blocked Image: https://www.publicdomainpictures.net/pictures/250000/velka/edinburgh-shopping-victoria-street.jpg]