A quick fix for the dining room would be to center your dining room table in the dining room area. You can define this room a bit more clearly by adding a chandelier centered above the table. For the living room, the loveseat can remain on where it is, but pull it away from the wall. Move the loveseat so it more to the right, it does not need to be centered under the window. Place the larger 3 seater couch along the wall where the coffee table currently stands. It should rest under the window about a foot away from the wall. Place the side table at the corner between the now perpendicular sofas and center the coffee table in the room. This will give you space for a nice entertainment unit where the large sofa previously stood. Alternatively you could place a credenza here to store your dining room dishes or additional storage. Lower the painting on the wall to eye level so the center of the painting is at 54" above the finished floor. Purchasing new window treatments or drapery panels that coordinate with a new throw and cushions for the sofas will tie the elements of the space together and make it more cohesive.

Is there something in the room you want reflected back that you love looking at? If not, why don't you find a nice piece of art work for the fireplace so you have something to enjoy rather than looking back at your other wall?

I feel it's too heavy looking for your room. You say it's a very large room, so you don't need it to make the room feel larger. Perhaps look for a picture/painting.

Hi Angela, this space has mega potential. For starters it has fantastic symmetry. However as the space is very long I would recommend you break it down into 2 zones. The front zone as the place for bride and bridesmaids to get ready and the end wall zone as the sleeping area. Divide the space with a set of luxurious pooling drapes, and keep the lighting in the sleeping zone dimmable wall hung bedside lights and and a conversation piece chandelier. Go for warm colours and a touch of gold. A high oversized shallow tufted bedhead will add luxe. A upmarket Bohemian theme could work well. The bridal preparation zone needs to be well lit, (daylight) bars, with floor to ceiling opposable mirrors, (side lit also). Remember this is a functioning space, there needs to be ample hanging for dresses/clothing, clear space, formalish seating (no bride or bridesmaid wants to get stuck in a low lounging sofa and need a hand-up. Have sideboard space for jewellery, flower holders etc and keep the colour palette very neutral, a blackwhite, and mid range neutral grey will work with any bridalware. If you would like any further advice you are welcome to contact me. As an interior designer I often work alongside a styling company that specialises in weddings and other events.