I really like it as is too, if you don't need the privacy. It feels nice and open. You could always opt for a roman shade in a fabric. That might help you get that "warm" feel.

Romans are a great way to add warmth to any room. Also consider Pirouettes: that are Roman Shades with a view (they allow natural light in when open but filter out the harmful UV rays)
Linen/Screen Romans or Rollers also offer an uncluttered looks:

I agree with leaving the room as it. You have a great looking space with the wall color and Woven Wood Shades! If you add a drapery, it may make the room feel smaller and more closed it.

Leave it. Would look cluttered with drapes. Looks warm enough.

I would add a shade over the door though.

I would use draperies on the windows in a very simple, natural fabric but use the same fabric for Roman shades on the doors.