Ok, so repainting the room is an option: that's your out! Or should I say "easy" solution? Repaint in a color more in keeping with the gorgeous rug (which is beautiful and valuable on many levels-honeymoon purchase being one of them!). Then your window treatments (panels-maybe) will be a much easier decision. I'm not loving the panel options mentioned above, which I think are nice, but a tad too informal for the direction you have taken with your room. Plus, they are very trendy, which again is not in keeping with your traditional style. You have heirloom quality pieces there! The rug and furniture should stay. Paint is cheap (compared to the investment in good quality furniture and the rug)! That's the way to make a significant impact without breaking the bank. Take a good look at the colors in the rug. On my monitor I see blue as the primary color, but monitors vary. Go to the paint store and bring some sample cards home, narrow it down and then go back and buy some paint samples and splotch away. In any case, have fun with this project!

Now I understand where you are headed. My suggestions will not be matchy matchy and are pretty eclectic in nature. So, hopefully you will get some ideas you may not have thought about. Let's start with the DR. Drapes: I like dramatic so, if the rug has bronze that would be my first choice though there is nothing wrong with gold. I like plain simple drapes. I think drapes like blacksplashes should not be a focal point of a room when you have other beautiful things going. They should help frame the room like the color on the walls do. You may not need pinch pleated drapes. It would save you money not to have the pinch pleats. You need to decide if you want to run them from ceiling to floor or with a rod (I saw some beautiful rods at Calico Corner's. I think JCP carries Kirsch hardware also) above the window not from the ceiling. Dining table: I notice most people select wood to use with oriental rugs. I am working with a designer for my family room and breakfast nook and he just taught me a good lesson: Print rug-glass table, solid rug-wood table. He said you want to show off the beauty of the rug at all times from every direction. They do make some very large glass tables that you can use with 2 wooden pedestals for support or a great square base. If you are having a lot of guests for dinner like Christmas than you can add a folding table and use the same table cloth. This is just a suggestion. You can use wood but I always like to share new knowledge when I learn something. I still like crystal for chandeliers in dining rooms. In this case I would use crystal with some funky lamp shades to add a little fun into the room. You may find these at Home Goods or on line. I would try leopard for shades. It's hard to visualize if this will work without actually seeing it in person. Maybe someone will photoshop. Do you know the size of the table you want to use? I also think you may be able to find dining room chairs on ebay or a used furniture store that might be in decent condition or you can buy them new. Remember the chair wood does not need to match the wood of the table. There is more interest created when they don't. Here is another idea for chairs: you can used entirely different ones for the head of the table. Actually, I am pretty good at decorating eclectically. My friends are always looking for my eye. The designer I am working with always says to me "what do you need me for". Well, he is a great buffer between me and my BF whom I share my new home with. He has made my life so much more easier and is worth every penny. I am also learning alot about decorating from him.

I love the clean, uncluttered look of your home and you've made some great furniture choices. My first thought, though, is that I would try to rework the sofa/sectional placement. It really is unwelcoming looking to me to have the back where it is facing a wall, when it could be oriented to look into the room and out the windows. It seems like if it were placed in the corner under the stairs that it would feel open and invite you to come in and sit. I'd hate to be cooking in the kitchen and have the family or guests with their backs to me. If you are having a TV in another room close by, do you need one in that room, too? If, so placing a 70" unit will probably only work as you have it. But, to me, it's not going to look like a living room but more like a movie theater, which is fine if that's what you're going for. It seems like it won't be a cozy conversation area, though. I might actually flip the rooms and put the dining room where you have the sofa now. I was looking at lights used with dining rooms and ghost chairs and saw this, maybe would work in the living room? Kind of fun. don't know if it would look as good without the colored walls though. And I thought something like these were interesting to consider for over your table:

Sounds like a fireplace re-do might be a longer-term fix. In the meantime, I'd paint the mantle a dark brown, a similar colour to your end tables. It's not trim and shouldn't be white. It pops out too much in the white colour. Another idea that doesn't involve any ripping-out is to go right over the existing mantle using a mantle slipcover in wood. Here's one of many how-to's on the internet. If you stained your brick as well, you could have a whole new look. https://www.fwmadebycarli.com/2011/01/making-of-slip-covered-mantel.html