You may find this helpful-

https://stylebyemilyhenderson.com/blog/rules-for-picking-a-coffee-table-105-best-coffee-tables

Move the sectional away from the walls as you see in the image below. I would add a floor lamp in the corner.

3D items like these will work effectively on your wall between the windows

I agree, use one of the colors in the rug for the romans. I wouldn't put anything between the windows. You already have a large, bright pic next to it and I think in this case, less is more.

thank you!

Thank you all. While on the topic of wall art I've got this wall here to the left of the fireplace in the same room as the pic above. What would work here? A mirror perhaps?

I have these samples. These colors are found in the rug (thank you to those who suggested matching roman shades to a color in the rug). My question is, what do we think of Bamboo/Grass texture shades shown here?