Here's a little bit of explanation for people about why the idea of the Limited Edition skins being rereleased is a problem:
The elitism thing /never/ has to enter the equation. The point of sale for a lot of people was that they were advertised as One-Time Only skins. Moral dillemas, ethics never have to enter into this. If a Sale is made based on an assumed promise, and that promise is not kept the deal has changed, the sale's point of interest has gone away retroactively; This is technically defined as "False Advertising."
Frankly, I would imagine that Riot's legal department had to consider for a while about this. Not only are their ethical dillemas in going back on your word about a Sale, it CAN lead to a very, very bad situation if the deal that people entered into (A form of contract) is voided by the seller.
No matter how much you want those skins, it is simply impossible because they were advertised as something special and unavailable in the future. People bought those skins FOR that listed reason, meaning it was the primary reason of sale for a number of individuals such as myself. If that "Listed reason" stops existing, then in the end people were baited into purchasing something under false pretense.
Sorry, that really is the grit of it, guys. To release those skins again would mean a certain level of public backlash, and debatably a Legal landmine.