One possibility would be to swap the living room and the dining room. Since the current living room is larger than the current dining room you could still keep some comfortable seating (couch and upholstered chairs?) against the front wall for a keeping room/dining concept. Then your new dining areas (kitchen and dining room) and living areas (living and drawing room) would have good flow between them, which would work well both for family and entertaining. You could also add some builtin bookshelves in the drawing room or new living room to create a library area to add another fun element to the living areas. These bookshelves could be against the long walls in the drawing room, around the window with a window seat in the living room (former dining room), or built to create some separation in the open area between the drawing room and living room/stair area. Your plan seems to show some sort of builtin there, but I'm not sure what it is.

You could also bring in some texture with bamboo sticks or decorative branches and help balance a bit the height of your room with small scale furniture. Spray paint them if you find the perfect size and shape but they aren't the color that you need. Ikea carries white decorative stalks for a very good price. the ones in the 1st picture hold well with small kids around and you don't need a vase for them. there are washi paper or crinkly paper floor lamps with a soft beautifully diffused glow For a budget friendly version check ikea or target http://www.ikea.com/us/en/catalog/products/80028552/

If you love that wallpaper, use it in bathroom. Not really right for behind bed. I would go a drum style chandelier. In a silk pale gold. Your bed looks zen or Asian to me. I love it. But, you don't. Need to much with it. Keep it simple a more formal drape on windows, color would depend on wall color and bedding. I'm thinking a dramatic peacock satin. Use a lighter same tone on walls a rich teal. Ceiling can be gold leaf. With alight that cast shadows on ceiling at night. Then your wall paper will tie in. Furn should be mirrored.

Dear Crazyjunglite, please let me add some ideas for your space. I beleive that a nice combination of two curtains like the one with the blue and peach double curtains in the picture, will give you an eclectic feeling that matches to your painting. The combination of colors that I suggest is this blue with brown flares and the cream-peach taffetas, and the soft cream sheer behind. It will join all the rest beautiful items suggested by now: https://www.etsy.com/listing/163787105/blue-curtain-polyester-fabric-122-inches?ref=shop_home_active https://www.etsy.com/listing/163785041/light-yellow-beige-curtain-polyester?ref=related-6 https://www.etsy.com/listing/167660815/35-discount-for-one-pair-of-two-beige?ref=listing-shop-header-1 https://www.etsy.com/listing/167363693/ecru-sheer-curtains-fabric-118-inches?ref=shop_home_active