You’re correct, they could, but they won’t. They know Mage Tower is a very heated topic and this is most def something they will more than likely not do.
Exclusivity does not care about feelings.
No, because it opens up the gates for even Bilzzcon goodies that are sold as a that blizzcon thing, to them being open and brought back too. I don’t recall them letting anyone have blizzcon stuff from 1 year 3 years down the line or any other time besides that blizzcon.