That guy in the window has caused problems before, because it looks odd and seems really out of place. Who knows - perhaps he's a big headed alien, scrabbling around on his knees looking for a contact lense?
Using the docking port as an aid to scaling is a good approach - it's one thing we saw really clearly (interior wise) after all, when Scotty and Kirk boarded the inspection pod. Logically, the docking port would have to be at least
It's surprising how much evidence there is for this larger design, I always assumed that the prop builders for TMP worked from the officially published scales, set up from day one! Maybe things didn't look quite right (asthetically) at that scale?