Pinned straw:
It's an interesting one. I think the issue you might run into is that for SOTP to work there has to be a catalyst that crystallises the various parts. With Lew owning ~30% of PMV any divestment would have to go through him. And AFAIK he has no intention of breaking up PMV. In the absence of that, I guess the market will just price PMV on some basis of cashflow to equityholders and not the underlying assets.