Sammy bro, you need to relax here. You're all over every thread with this PVC issue. Honestly, it's not that big of a deal. Are you planning on picking up your PFs and hold them in your arms every night to feel how much they weigh?
It's not the first time SS had to use PVC on a statue. Would you rather the statue bend, break, and fall down due to the excessive weight? Would you rather just two solid feet on the ground to hold the weight in static poses while sacrificing dynamism? No? Then sorry, sometimes lighter materials need to be used in order to achieve the pose and position of the piece without fear of it crumbling under its own weight.
I highly doubt this is going to be a solid polystone piece. The pose and base just can't dictate it. Solid legs, hollow torso? maybe. Partly PVC body? maybe. Solid heavy polystone? Negative. No chance.
In the end....if no one told you the MOS PF was PVC would you have noticed? Just by looking at it.