It looks quite alright, I think. How about another point light at the top of the stairs, Surely, there are windows up there to fake. the spotlight may be too strong, or maybe it shouldn't lit the floor, it looks too bright. Another small point light on the right corner of the room would lighten up this dark corner. What I find a little disturbing is the overall yellow-orange colour in this scene. Maybe you should chage the overall sky colour and ambient light colour to a light blue colour and ses if it looks better. 
Just a few thoughts.