138 hours. O my gosh. You've been patient.
I almost hate to say it, since so much work has gone into this. But, it looks like this render is a little on the cartoon-like side. If you wanted that, great. If not, then consider doing things to bring lighting back around to more 3D-ish. It looks sort of strong and flat. If I can help, I'd say try bringing out more shadows by using only one direct light source with shadows turned on and a couple of other less strong light sources without shadows for some slight fill. Maybe lower the sun. I don't know. I think you should have some more GI turned on, but 138 hours is a heavy price.
Maybe the water has something going on it that is heavy on the clock. Do you have any reflective anything turned on anywhere?
