There are a number of areas that can be improved and it would be up to you how many you feel are worth the effort. My first suggestion is to consider the Law of Thirds to balance your composition (do a search to understand the meaning), another is the areas of importance you want your viewer to follow, as in a path of inspection starting in the foreground and leading to the background. Another is the Law of Odds... which would suggest you use only one chair in the foreground, move it closer to the first third in your composition and add some layer of texture such as a soft throw draped over the chair. I would remove all the people... they actually are hurting your scene. It would be better not to have anybody if they are so disjointed as they are currently. Another is the story... why are the flowers transparent? why is their a wine bottle all the way in the back but there is no glasses? Shouldn't the story be told on the coffee table? Add or suggest that the story continues in the back room... currently it is a dead space. Why are their no doors or why are there two doors side by side and different sizes? I would suggest rotating your camera to the right and target the book shelve, currently the camera target is staring at a blank wall? I would add a Photofilter (in Photoshop) to add warmth to the room... being so cold and blue only separates the viewer. Maybe I've said too much...
