ok for me there is a lack of sharp specular highlights throught the scene. Surfaces such as those vases would have a fairly well defined white highlight (assuming that they are shiny) do you know what I mean? The whole image to me seems to be a little soft and fuzzy (not blurred). It's hard to explain. Look around a room and yuou will see spec highlights everywhere (especially if it's sunny) I am sitting at my desk now and my keyboard keys have a whte highlight, my desklamp, my coffee cup, my keys, everything. That's what I think is missing and making the scene look soft.

Sorry if this doesnt make any sense