You can give the effect of depth with blurring by blurring certain areas to an extent, not over blurring, Lightning draws attention to the focal not depth [Silly Concept] Depth is to help detail the tag. Example, You can have perfect depth, but without a light source the tag is dark. The light source helps add to the focal
The depth can be solved very easily, instead of blurring the entire image use a Layer mask, G Blur to about 1.3, and use the black/white (either/or) brush tool to bring out the face and keep certain area blurred to create depth.
This is not CnC, just my opinion on depth in general, use my method or not doesn't matter to me.