Terrence, I also use Plasticville on a CC layout, and here's my 2 cents. They look,or seem to be more S scale. They can be spruced up a bit with weathering, and that's actually good time spent learning techiques. I never glue mine together.....after all it's a temporary carpet central and the pieces will go back in the box.
As for lighting.......the whole structure can GLOW and looks non-realistic, so maybe spray the interior with a paint, or mask it off a bit. I took a thin piece of platic sheet, like from an office supply store, cut a narrow strip like 2 inches wide and formed a short fat tube. Put the LED (dont worry they dont get hot) in the middle on a stand of some sort.The open ended tube diffuses the light very well. I'll say Plasticville does have "credible" detail. But hey!!!!!!!!! add parts..........go kitbash!
