Umm yes I read exactly what you wrote. Stsq strength correlates with the skating skills. And pcs is not only awarded just for the artistry (or Interpretation as it is labeled in the score sheet).
PS. I say this as someone who thinks Daria has the best interpretation of the current Russian juniors, my next favourite junior in that aspect now that Aliona has moved to seniors.
Well there definitely isnt a category in pcs for how well you land your jumps which is the argument you are using against her pcs