I would recommend that you tweak the lighting. I understand that you want to show everything clearly but the effect is more like an operating theatre than a bedroom.
Refrained from a reply to this as I’m not a V Ray user. But I think I have some useful comments to make. Your question “how to make this better” is actually a little vague as we don’t know what you want the final image to look like. You might get more suggestions from V Ray users if you were to post an image of how you and your boss would desire your renders to look like. Generally speaking I agree that the lighting could use some tweaking but I feel the biggest issue with the image you posted is the overall “camera view” of your scene. The extreme distortion in the image makes my brain a little crazy. The majority of the time I set up the scenes I’m going to render with 2 point perspective enabled.
In my opinion that is a very good rendering. I’ve seen a lot of people work hard and not get results this good. I don’t have any real suggestions, but I did want to compliment you on what looks like a good model, with good textures and realistic lighting mostly. It’s quite convincing.