One reason this bike is so pleasing to the eye is because the slope of the forks is almost exactly balanced by the slope of the frame down the tank towards the seat - with the instruments on the handlebars forming the apex -and this angle is also caught by the rise in the back of the seat and you get this graceful sine wave along the bike. Another symmetry is the way the front mudguard, the cylinder head, the back seat and the rear fender lie along the same plane.
This is presented in a slightly different way with the VN750. Because of all the fancy engineering the cylinder head is higher, but it is disguised by the air intakes at the front, the seat and the higher rear fender. You also have the front cylinder, the engine end of the exhaust pipe and the rear shock absorber dunning in parallel, and the rear cylinder parallel to the rear frame - and the side panels counterbalance the paintwork on the tank.
Personally I do agree that dropping the seat will emphasise the sweep down and sharpen the lines but you need to be careful about how you balance the lines at the rear. I don't think the bike looks good with a bare ass.