Yes, you are missing a chandelier.

I would move the red chairs in to share wonderful coffee table.

I would take away that console/cabinet behind door and put it under art in living room. Keep lamps on it.

Take away the two small tables for use somewhere else (that are near red chairs).

Get a slim lined console for under the sconce on right as we look at photo, you could put a lamp there too. Maybe one there, and one in living room on cabinet that I suggested you move under the art.

Place plant closer to middle of window.

Are your drapes purple and olive green? I can't tell from photos.

Went shopping.

Chandelier and large area rug.

You need an area rug, picture is too high, bring red chairs in closer and the curtains feel too heavy for the room.

I love the wood floors. I don't know if I would cover them with a carpet. Totally up to you.

A big floor rug with plenty of texture, a few vibrant cushions scattered on your sofas and a nice statement light fitting. You won't believe the difference that makes. If you feel you can only afford one, make it the floor rug. That instantly grounds the room and gives a lived in feel.

Also I agree with Tina, if you lower the art work between the bookcases it will draw the eye more and close the gap