@FrogReaver, I'm having a hard time following how you're interpreting the phrase "can't see through this darkness". The relevant text of the spell says:
So the magical darkness created by the spell fills a volume--we know this because the spell text explicitly says that the darkness "fills a 15-foot radius sphere". Ergo, whatever other properties magical darkness has, it is a medium that fills a sphere. So far so good?
When someone asks whether one can see through a medium, from my standpoint, under ordinary usage, the answer to the question is "yes" if the medium is transparent, "no" if the medium is opaque, and "partially" if the medium is neither fully opaque nor fully transparent.
I had thought that you were using a close parsing of the text in conjunction with the errata'd obscurement rules to argue that "can't see through this darkness" in D&D terms means "heavily obscured". And that because the errata'd rule for heavy obscurement requires only that creatures are effectively blind when trying to see
into a heavily obscured area, not when trying to see
past it, you were inferring that the magical darkness created by the spell must actually be transparent, even though that conflicts with the ordinary meaning of "can't see through this darkness" as describing an opaque medium. From my standpoint this interpretation is not excluded by the text, but I thought it was unlikely to be the intended function of the spell for the reasons I've previously described (in particular, that it creates ambiguities that the DM would have to resolve, whereas interpreting the spell as opaque is very straightforward to run).
Now it looks like you're saying that your interpretation instead depends on reading "see through this darkness" to mean something other than describing the opacity of the darkness. Could you please clarify how you're reading the phrase "can't see through this darkness" and how that informs your interpretation of the spell as creating a transparent medium?