I think the art is hung to high. It should be at eye level. Choose a pop of color to go with your tans & Browns . Orange or red throw pillows or a rug . Is what I would do .

Create an accent wall...

No art work over head board, agree with lefty ( again) to lower art at the sides- but you need art with colour.

I would remove all of the art from the headboard wall. Use the blue artwork in another room. If the smaller pieces will work on another wall in the bedroom, you could experiment with placement.

If you want the headboard to be the main feature in the room, you will need to use plain sheers. The ones you have now fight for attention with the headboard. The heavy wood frames on the artwork also compete for attention with the light, airy scrollwork of the headboard.

Thank you all so much! I definitely agree with taking the sheers and the center piece down. Time to edit!