Other point with the DLC:
They already did this with Sebastian in DA2 without incident: If you preordered DA2 before a certain date, you got DA2 "Signature Edition" which contained Sebastian's DLC for free. If not, Sebastian was available on Day 1 for the same price, $10.
And the scenario I think most likely:
They probably thought a character and mission pack would at least be significant enough that people who didn't buy the Collector's Edition would feel jipped if they absolutely couldn't have it: As Nesta said above, it might not be so story significant, like Zaeed or Sebastian. Still... But wait, for this to qualify, wouldn't the pack had to have been made for the Collector's Edition before anything else? Well, guess what, it was. They announced it would contain an The promoting the contents of the CE, which was posted in November points it out too, just vaguely, probably because it wasn't finalized.
I'm pretty convinced it's this, so much so that I made a on my Facebook (that post should be set to public).
Of course, I could be completely wrong, but the above makes total sense, doesn't it?
I'm also getting the DLC, though it's because I have the CE preordered.