Leaving the plain windows bare feels very sophisticated with your design. If you must have something, not more drapes, some kind of blinds.

the windows are fine. A large piece of framed art above the sofa would add more interest than a mirror. (a mirror should reflect something fantastic)

I'd put the two chairs facing the sofa, for conversation. a small table between them for a cocktail or cup of coffee.

I love drapes in very simple interiors they lend a bit of elegance If possibe can you put the chairs sxs then a table in between and a lamp yes to adding more drapes You ar elacking lighting for sure and art the mirror just not working there If facing the sofa with the chairs you will need a largr rug and also no way to get light there so then for sure end table sand lamps by the sofa and amybe thta floor lamp by the windows where you take the chair awy. I think replacing the pillow covers with some color is agreat idea and I often do decor to go with art not the other way around.

I agree that art instead of the mirror would add a lot to the room.

Yep, art instead of mirror. Mirror isn't reflecting anything of interest. It seems hung too high. Make sure you hang your art with the center of the piece at eye level. (Your eye level.)

Who uses this space and how often? It feels a bit like a model home room - maybe too staged. I can't image who uses it now.

It looks like you have the best layout and room just needs more personality. I think a curtain panel on each window (per 2nd picture) would help balance the room. Consider a large plant in corner and a side table/lamp in the other or add two tables and I think the occasional chairs won’t feel as lost (try moving them out a bit and place on an angle per the chair in foreground in 1st picture). Regarding accessories, remove some of the items on the coffee table, add large art (hung low), and consider some patterned cushions for more texture. The room styles below are different from your room, but I wanted to illustrate the suggestions’ effects.

When someone walks into your home what do you want your home to tell them about you?

I am not finding anything here that makes me interested in getting to know you.

Neutral rooms need something to add interest. Either a great view, texture, spectacular architecture, art, a splash of color, interesting furniture or lighting. . .

We can't add this view, which works with very simple black and white furnishings and no embellishments.

You can add personality to the room with art and more interesting furniture (Not that I would pick that particular piece of art)

By adding texture - love this room!

Or by adding color

Replace the coffee table with a conversation piece

Add more wood to the room to bring in some warmth.

I would install an additional panel on the bare window and I think a large canvas above the sofa. would be more interesting the high hung mirror you have now.

What app do you use to do a mock up like this?

Your room has very nice elements but it looks like a black and white photo - it lacks any warmth or personality. I would add some color (art, pillows, rug, wood table).

Some people like a b/w color scheme. I see no problems with that.

I see the mirror as an architectural focal point and in that sense it is not too high. The shape echoes the arches.

I wonder what is across from the sofa. The other half of the room.

@shortiecake

I simply use PowerPoint and work form the photos.

I personally prefer a large canvas to the mirror as I find it brings an interesting element to your black & white scheme instead of a plain mirror.

Maybe expand the seating forward to use the whole space (would require a larger rug and coffee table)? Placing the two existing chairs together facing a second sofa at right angles to the first would break up the absolute symmetry while remaining balanced. I added a classic modern egg chair at a 45-degree angle and a couple of linear LED light fixtures to introduce some curves. Loved @lisedv's art and added drapery panels, so used those here.