The cabinet in the corner makes it feel a bit crowded. I think some drapery panels would make the room look more finished. If you put them on rods wide enough to keep them pulled back off the glass, you won’t lose any light or views, and will gain some softness. A rug would also be nice but not necessary.

Why does the bench stay? It encroaches on the chair and throws the room off balance. I also would get rid of the tall cabinet and replace that chandelier.

Is the buffet the tall black piece in the back? I'm seeing a disconnect between that, the brown furniture and the white claw feet of the table. I would definitely stain the feet brown. Please change the light fixture for something less Victorian. If you plan to leave the table against the wall on the right I would take all the clutter off it and find something decorative to put on it. Does the bench have to have the material draped over it? Find some curtain panels for each side of the two windows, making the rods long enough that the panels don't cover the windows and whatever structure is underneath the back window.

Finally, a beautiful patterned rug, perhaps an Oriental, that covers most of the floor would pull everything together, assuming you have enough room that the chairs will be on the rug when they're pulled back and that this will still leave at least one foot of flooring all the way around.

It would be a good idea to post more pictures from different angles to get a more complete idea of this room.

I’m guessing the bench is for a pet. I had such benches in my house.

Clean off the junk on the buffet, lose the bench and the tall cabinet (both are too big for the room), add a farmhouse chandelier and burlap curtains, collect some cool plates to hang on the wall.

Less is more! Don't add, but subtract. In the case of the light, upgrade it. Hang drapes that match the wall color to increase the room size visually (see grover's pic above.) Hang them high and wide to fool the eye as well. A rug needs to be 36-48" bigger all around than your table top, yet not run into walls or furniture on the walls. Measure and use painter's tape to see if that is possible in your small space. It may not be.