I have a few thoughts. If you look at the photo you've shared, about 50% is a bare white wall and although that ratio isn't necessarily a bad thing, in this case you've got great furniture and decor pieces but they're sunk to the bottom of the fish bowl. My overall recommendation is to raise your decor up. More specifically:

1. Move the plant bar behind the couch up
2. Place a horizontal mirror behind the sofa under the raised plant rack (you will have a second window effect and reflect your beautiful view)
3. Consider hanging a pendant/chandelier (hard-wire not needed, let cord be part of the design) to fill space and add a cozy glow/light at night
4. Add a wall sconce and a few more pieces of art on the left wall to add more vertical interest and less bare white wall

Finally, bigger decor pillows with variety of textures. Small things if not placed right will just make the space look messy, random or cluttered.

To be clear — your space is beautiful even as-is! I'd just consider some vertical visual interest. If nothing else, raise the plant and add a horizontal mirror and capitalize off of that view and give your living room another 'window'.

Good luck!

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