I feel like the line of the "we can do it" and the row of blue and white china and then the table...that area feels cluttered. I love the wall color though. I think if you mounted a floating shelf that is black on the right hand wall...then put your china up there. ...the black would tie in with the black in the "we can do it" piece and it would leave that sofa table to have something simple on it. Or....maybe scale down the china collection to just three pieces to one side of the sofa table and then something else more translucent on the other side. Maybe a small, low profile, vase of flowers. Just my thoughts. :) I love the wing back chair too. This is a pretty and relaxing room.

I think you should center the console table and the art behind the desk (and it looks like that would also center it in on the wall?)
I think you're making a good decision on the widow treatment. Rather than a table and lamp in that corner what about a floor lamp? I feel like with the two accent chairs and another little table on the long wall it is too many pieces. Is there also something on the floor between your desk and the console table?
I agree with above about paring down some of the pottery.
I like the room a lot but I agree with your instinct that its a bit cluttered.

I would paint the sofa table black so as not to compete with the picture. You could place your pottery pieces under the table. I like the idea of white wood blinds for an office.

Have you thought about centering your desk in the room, closer to the sofa table (if room permits)? Then place your chairs facing the desk.

Take the vases off the orange table and leave the crtain. It all works well. Nice job.

You have some great elements within this space but you do need to omit some items. I would start by taking out the two lamp tables. Separate the chairs and move the orange console here. Leave the vases on the console but add a wall shelf above to help unclutter the collection yet keep them grouped. Keep the poster where you have it but centered between the corner and the window. This way you are distributing your pop of color more evenly throughout the space rather than heavy saturation in one area. Then tieback the curtains to the corner side, so they allow more light and look more playful.