Hey man, this looks awesome! I really like it 
How did you achieve the nice indirect shadows when you use dynamic lighting? and also, how can the GI change when you apply different materials to the walls? LPV doesnt give enough precision and fidelity for archviz and there is no other dynamic GI solution yet.
I assume you baked a stationary skylight and use a movable directional light? Argh…I will just download your scene and have a look 
Cheers!