The only reason I didn't immediately know it was a Hades/Persephone story was that I was distracted by HD's real name being "Haru," which is Japanese for "spring." Probably not an accident, given the other things Eugie Foster has written, but it meant I kept watching to see if this was going to go a different direction.
Once I knew it wasn't, then what distracted me was trying to map things to the myth, and only sporadically succeeding. As others have pointed out, the corporate strand of the plot -- buying Renewal, etc -- didn't ever, um, come to fruition (sorry, I couldn't resist the pun). And if Soaces was supposed to be a mythical reference, it's obscure enough, or the name has been altered enough, that I couldn't recognize it -- and I'm the sort of Greek mythology geek who used to be able to name all of the Seven Against Thebes. Trying to figure him out, and the Renewal thing, was again a distraction, and the story's own structure wasn't compelling enough to pull me back in. A retelling doesn't have to match the myth precisely, but where it diverges, I need a clear sense of what Other Thing the story is trying to do, and that didn't happen here.