More control over DOF

Hi there, we are experimenting a lot with twinmotion at our office and are very intrigued by it. We would love to use it more.

My question is related to the depth of field option within a still. Looking at the picture attached here, i've placed the focus on the roofing of the building in the back, but it's hard to notice any DOF in the front. We would like to be able to have more control over the start/end of the DOF.

The DOF is more noticeable when an object is very close by it seems. Would be greate if we could get a strong bokeh.

Thank you and good luck with development :)