Do the windows match? Same style? Same size? IF they do, I wonder if it would be better to just have panels on the outside instead of so close in the middle. And even if they don't match, is it worth a try to just do the outside? Would love to see a pic that way if you have the time.

Then what about putting the couch on the wall instead of in front of the windows. Leave the rug as is so the front legs of the couch would be on it. You have a great base color chosen as your primary accent color. Find some art work for the wall behind the couch then with that color in it, too.

Is there a little table right there, too, that could go on the side of the couch for a lamp? Or maybe consider a floor lamp as lamp lighting in a room adds great ambiance.

You are THIS CLOSE to making this room stand out and I hope it is just little things that can make it happen for you. Love what you have going on here!!!