What I wrote is not a criticism on how PV Elite distributes masses. To be fair, I do not understand why PV Elite/you make the central point of discussion the mass distribution.

Where the mass distribution interferes with a building code philosophy, to be more precise?

I think the mass distribution affects directly the modal parameters and indeed the fundamental period of vibration is a central figure in building code.
Do you think the fundamental period is not calculated properly because vessel with legs mass distribution is not as for a building? This is the sense of the PV Elite warning?