FWIW I had reason to keep the front of my GTL off the ground once (I forget why) and wound up putting 55 lb of plate weights in the topcase to unweight the front wheel. To do it by hand I had to use both arms and lean onto it. On my RT (and GSA) I can do it with one hand.
I think it would be necessary to move the centerstand forward about 2 inches to balance it better, is there something about the frame or engine that would keep BMW from doing that? That said, I doubt they'd consider doing it now that it's probably past the midpoint of its lifecycle, a change of that magnitude would be expensive, and it hasn't been a big deal for most owners.
A Goldwing weighs considerably more than a K16 and IIRC is no more difficult to centerstand, and is better balanced when its up there, so I don't think ease of centerstanding is a consideration of where it's placed.