I think the modelling team was directed to make as many organic parts fit together as possible. There is a definite flower feel to it, it has a couple nether parts, a few holly leaves, tentacles, hip bones, spinal cords....
I know it's way off the canon into speculation, but since the Borg were Caeliar based, and we never got a V'ger explanation, I'd like to think the discovery of the Caeliar may have given the techies a few more options. It does have an organic feel, like the ship grew itself how it wanted to. And V'ger met the "Borg" but what if these were a more benign Caeliar offshoot? They are similar, but not the same enough...