Leather sofas can really dominate the room and can give an overall cold feeling. I would add some earthy elements, like a wood coffee table with glass or metal. Go to Restoration Hardware's website and look at their sofa room scenes. And I'm sorry I think the art is too harsh for the room. That's all your eye goes to in the room. too overpowering. I would look for something softer or maybe a cool mirror and I would add color to the room with pillows and some colorful lamps. I also think woven blinds would look great. They add warmth and give a finished look. The color of your window treatments should contrast your wall color a bit, not match it or else it starts to look generic and blah.. You have warm walls, warm floors and the woven blinds, like Hunter Douglas brand would pull it all together for you.

Susan, I find that people often make their coffee tables too low and too small. Measure the height of your sofa cushion and pick a coffee table that is a similar height. Also, in the layout you posted above the room would look better with a larger coffee table. Even as long as your sofa, or close to it. Let me know if you need one custom built, it easier to get the right thing for your room than you may think. Here is my etsy store if you end up needing one custom built. www.etsy.com/shop/MetalTreeFurniture

Manisha. pls do not remove any of the handmade beautiful patterns both on the main house as well as the boundary wall. They are the most interesting bits. In fact if you still have the contact detail of the mason who made this I would be glad to employ him! Without the patterns it will be a plain characterless facade.

I feel partitions are not needed. You already have too much for the space. Adding a partition will shrink the space further. The simplistic solution, you do not wish to discard any furniture would be to paint all the walls in lighter pastles. And use some wall painting frames to highlight certain walls.