A rustic or modern mirror on the wall would help open up the space. A painting over the fireplace, or a cool framed map would also look great. Your small table is great for the space...throw a washable tablecloth over it in a cool blue and have some pillows that compliment the table cloth. Potterybarn has some nice ones and Wayfair does too. You can change up the feel of the place with a throw, some pillows and a tablecloth. I think cooler colors should be more dominate like blues, greens or even greys with maybe a touch of orange or yellow as you have enough warm colors going on. A couple of cork backed placemats will clean easily and you can layer them over your tablecloth for a great look..