The rug is too small not too big. It would be better as a square shape in this space.
Because there is so much dead space by the windows, i would move the tv down so it is centered to the whole wall rather than to the part of the wall that is between the door. side the sofa down, and put the rug more under the sofa than the tv stand. This will allow you to but a chair angled toward the tv under the window. I would put the black book shelf in the dining area on the back wall.
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Living room setup
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