I would move the tv to the wall where the couch is now. Move the couch opposite, with its back to the sliding door. Consider adding a sofa table behind with a pair of lamps to bring more warm lighting into the room. Keep the small chair where it is on the right side of the fireplace, and use the floor lamp next to it. Put the chair and a half and ottoman to the right of the couch, the end table and lamp beside it. Move the whole arrangement a bit closer to the fireplace, and make sure that the front legs of the couch and the chairs are on the rug. I agree that the coffeetable is not the best choice. I would love to see something round, perhaps a wood or slate top, with iron legs so that you don't have so much heavy furniture in the space. Down on the end wall where the tv is now, I would think about a game table and chairs in the corner where the screen is, great for snacking or playing games or doing puzzles. I would find a new home for the screen. Then a group of bookshelves with some closed storage in the same finish as the tv cabinet to the right along the wall to allow for storage of some of the toys, as well as a place to house books and media. Take the clock off the fireplace and use that on the end wall where the game table will be. Use the canvas you have on the fireplace, to bring some of the warmer colors of the room onto the grey fireplace. If your DH doesn't want to paint the fireplace, check into staining it. Just giving it a warmer finish would do a lot for the room.

I love how they used the floor tile for the backsplash here and topped it with the mosaic. The floor tile may have been cut down to fit. Would that work with the materials you've already selected? I would rather see tile than 10" of counter material. It would be okay to leave a gap at the top of the mirror. I assume you're not putting lights over the mirror or I'd center it.

Our living room measurements are 20x14.5

Hello Alexey, Once the house has been built and you are able to stand you living room It will be easier for you to see what will or will not work for you. Especially since you are still fine tuning various aspects in the room such as window size, etc. Thank you for the updates. That helped. Please know that the furniture placement is the only thing that is being presented NOT the style or colors in the room. we put a piano in the room in place of your electric piano. We don't have one in our selections. There is enough seating for 10 folks with the padded stools around the room. there are two book cases. One on opposite sides of the room, as you can see, this was intended to give you a "play area" for your little one that includes the open space in front of the piano. We put 4 chairs in the sitting area but you can easily move them around the room to another location or omit 2 of them and pull extra seating from the dining room table when you more guests. Hope this helps. Best Wishes with the construction of your new home and congratulations. We wish you many happy memories to come in your new home. MAE