I would take the two small pictures off the wall and add a large decorative mirror with a nice sideboard table in front of it with two buffet lamps. I'd keep it simple on the table with just a nice vase of fresh flowers or perhaps a set of three lanterns with candles or a floral centerpiece with hurricane candle holders on each side or nice candlestick holders on each side, etc.. Now I'm seeing that you changed the direction of the table which I love and added large artwork! Great! Love the centerpiece too! I disagree that the shades make the fixture look dated yet I think different shades that are more contemporary (straighter and no seams) might make it all fit together better.

Go with your most neutral color on the walls. I'm assuming you have no furniture yet, so the safe thing is to go neutral on your larger, more expensive pieces, the ones you won't want to be replacing anytime soon. Use your accent colors--the brighter blues and greens--in art, pillows, throws, rugs, and kitchen accessories.

These could take your dining room in an interesting direction. https://www.overstock.com/Home-Garden/Coaster-Company-Grey-Mahogany-Rattan-Greco-Dining-Chairs-Set-of-2/12529444/product.html?refccid=65ZGMNSBNFK3IC2CYX7KZ76ELM&searchidx=73&keywords=&refinement=style%3ARustic

Making some suggestion that don’t involve making big changes that you want to avoid doing. The biggest impact in my opinion will be to lighten things up. Windows-I included a pic of sheer drapes with the proper fullness. If you can, add additional sheer panels to the windows and remove the teal drapes. The sheers should go across the entire window. Pull the China cabinet out a few inches to allow the. To fall properly. You already know to replace your rug with a lighter one like Nicci suggested perhaps. Arrange the China and glasses in the cabinet like someone suggested so it looks interesting. Please remove the small objects and small pictures on the right of the China cabinet including the stool and plant and pictures on the ledge. A cleaner look will rest your eye and when you get used to it, I think you will like it. A nice centerpiece on the table to compliment your room. I have also included a couple suggestions for counter stools for the kitchen island. I like the X back stool since there is so much wood tone in the kitchen and the black will work as you suggested. It doesn’t swivel but don’t know how important that is. Good luck.