That was my first impression too on seeing the latest pics. Maybe the light colored drywall. How and what color are you going to finish the walls?
Sheetrock made a huge difference. The timbers really stand out now. Not sure why but you guys are correct. It also looks bigger in person and not just in the pics. We plan to keep the paint a lighter color. Something in a beige but so many variations we need to get a few test samples up this week.