I'm not arguing. 40$ is worth the price and it's a fact. All DLC are included, updated graphics, stable framerate et cetera. They should have made a heavy discount for those who have the original, though.
As for the discounts, just mentioning that the price will go down eventually.
Also I don't see the game on the store, so this seems like it was a mistake. I'm sure they'll sell the game separately at some point but it's too early. Same thing happened with CoD Modern Warfare Remastered.