What a spectacular room. I'm going to assume that you want to use all or most of the furniture that is in the space now. Sitting area 1. The vignette with the chest, mirror, side pictures and plants that is in between the arches - take that entire set up - wall art and wall, and move it to the wall where the desk is now. 2. Move the table and chair set up underneath the other window where the white chair are. 3. Keep the white chairs where there are but flip them to face the window and pull them back a bit. (They will be facing the table and chairs that you just put under that window.) 4. This is now a sitting area. Find a large rug to define this area. Play with how far back to pull the chairs and how big to make this area feel. Does it take up half the room? 2/3 of there room, less? Still thinking on the other part of the room. Who uses the desk set up and how often? It is the odd piece out in this room for sure. If you can find another place for it in your home or sell it, I would. What age people live in this house and what kind of play will happen in here? Remove the basket from the right of the piano and center that piano on the staircase. It feel smooshed in the corner.

I understand what you are aiming for. I don’t think the pillar is an issue, because even if it were not there, I think the expanse/footage and layout of the space would basically dictate two seating areas. I think the new sectional placement I suggested would automatically make the two areas feel more connected and inclusive. Then, if it would make sense for the way you use your study/office, as one option, you could use 4 swivel chairs, with a center round coffee table/ottoman there. This way, people have a separate area for conversation, etc. - but they can also easily turn/swivel their chairs ( and if the chairs are lightweight enough, they might sometimes maybe even move their chair ), to join in with what is going on in the adjacent family room.

Get a 10' x 14' rug and place it with short side facing the sliders. Put an 82" sofa facing the fireplace, another 82" sofa to the right and 2 chairs to the left near sliders. Like this, but arranged as I described above.

We understand that you’re probably really really busy and don’t have time to do the sketch. We really want to be able to help you, but we honestly do need a picture of the room with your back to the couch because we cannot see the corner that is now opposite where you have the TV. if we could get that picture then we could come up with some suggestions. That would make it possible for us to help you.