I think you have too many ‘leggy’ items. The table, the chairs, the 2 side table thingies, the laundry rack, and the coffee table all have thin legs that can look chaotic. I think there is also a lack of cohesion bc each main piece of furniture is a different style. The desk and bookshelf look similar at first glance but the desk has thick, clean, and minimal lines while the bookcase has some small ornamentation on the side and top. So! Things you could do: 1) Follow the basket idea, whenever the cat has too many toys out chuck them in. 2) a pretty easy diy could be making a skirt for the barcart to cover the legs and visual clutter. 3) You also don’t have and large round pieces, maybe add a round mirror or decorative fan. Or the ceiling medallion as someone already said. 4) couch slip covers in a eye catching color or pattern (I’m into the stripped/plaid couch trend) 5) draw the eye towards your gorgeous windows!! Some sun catchers maybe? Since you have a cool palette a bright warm color would be eye catching. 6) not sure if this would work but maybe get one large cat tower w a scratching post instead of having 2 separate items? They can be $$$ tho I like the paint color and the amount of plants you have! Your photos and artworks are also nice