This still looks like that to me - most recent comment shows up first amongst the responses. Is this how it’s going to be from now on? If so, I’m discouraged since reading comments is so tedious! I use the Houzz app on my iPad BTW, in case the issue is due to the platform?...

It seems placement could work centered or offset, but without the sconces only. According to your sketch, the sconce is too close to the hall. If the artwork is offset from the table, you have the balance and massing from the sideboard, so picture yourself sitting in the family room. First, you probably won't view the art perfectly associated to the center of the table. Then, if you see the artwork not centered on table/chandelier, that may be ok because the visual breakup with the sideboard may balance the entire view. And you've drawn like a long 6'+ piece, so it may conflict with that 4-gang switch box there anyway. But, I would probably just eliminate the sconces as IMO it detracts from the art anyway, and limits you in flexiblity for a different sized piece in the future. Then you can play with a centered or offset location upon hanging. I think either could work. Same logic I would apply to the sideboard, whether it can be centered or offset from the table.

Please ignore the 'pro' debby downer, who can't seem to say anything positive about anything. IMO! Will the paneling be vertical or horizontal? I really like the stone to the ceiling in your rendering. If you imagine what will go above the mantel (no tv but likely you will need large artwork because of the scale), if you stop the stone and do paneling above the mantel, then add art on that, you'll get a bit of a chopped up look - 3 materials (stone, wood, art) instead of just 2 (stone, art). I also think it will look nice from the upper floor to have the stone all the way up. If you hang art above the mantel, I don't think the tall stone look as imposing; above the painting will not be dominating, as your eyes will focus on the art and the fire. I've been looking for inspiration pics with cedar paneling and stone fireplaces on a vaulted wall, but they are hard to find.

@Mark Bischak, Architect, yes, good idea! I've already asked them to move the light switch that was to the left of the door, but I didn't think of the outlet. @LH CO/FL, I tried it in the store, and I could do it without opening the door all the way, but it would involve shifting the shelf above, so it should work even if it's a little bit of a production. My current FD fridge I think i've removed the bins completely like twice in ten years, but when you need to, you need to!