You do hav a lot of openings and "pairs" of items too. I'd suggest removing the side tables and four mirrors at the window wall. Lots of natural light is a good thing! I'd install floor to ceiling pinch pleat style drapery at the window as a "focal" wall. But, install the curtains floor to ceiling 10-12 inches past the window so the widow looks larger. If there is space, I'd remove your candle sconces from the entry to the space and install them on the left/right of the window. Less is more here, and the simple elegance of the drapery, 2 sconces and your pretty chandelier is enough.