No, they do seem to know what they want- it's just the bounding box used for pathing they want to change- *not* the collision mesh. These are different, and the path bounds box is just a box. Not even an actual primitive, in the previous games it was just an entry with a centre and H/W/D.
Also, a barber with enough patience can get a lot done: http://www.nexusmods.com/newvegas/mods/41604/?