I'm not seeing much shadows there? Love the mood and so on, but I would like to see heavier contact shadows (for chairs etc), because the light seems to come strongly from behind all those elements...
MMmm yummy scene with photonmaps and skyportals Yeah i also misses contactshadows and think it might be due to low numbers of photons or way to high N-values so it looks very smooth and clean but without definition. If you make the glaspanels in the background luminous and use photonmapping i think you get improvements.
can you try to render this with cached irradiance unchecked and FG min 200 max 0? Then we can see how contact shadows should look like with perfect FG interpolation. Don't use too high N or precache blurring or FG blur too.