I like the lighting very much so far. I allways have problems with textures´n light myself. the first thing what came up to my mind was the size of the models in the environment. they seem to be toys - if it´s intended don´t mind my post.

after watching the scene for a while I noticed the scaling of your environment texture. the human brain reads pictures in a weird way sometimes. I am talking about the ground to be more precise. you maybe want to play a little with the scaling of the ground maps. if they´re too big everything else looks too small. also to get some contrast in the scenes scale, maybe add just a few things in the right size.

but if the items are truly toys - congrats to this fine rendering!

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what else is the cleaniness of all textures. realistic stuff is never clean. I´d add some irregularities and dirt to the maps.