You must be new to the internet. I guess none of the devs have ever heard about the Forge and Heroes of Might and Magic 3.
http://en.wikipedia.org/wiki/Heroes_of_Might_and_Magic_III:_Armageddon's_Blade#Development
Basically Heroes of Might and Magic 3 was a fantasy game set in a wider fantasy and sci-fi blending universe. But most of the Heroes of Might and Magic 3 players had no idea that this larger sci-fi universe existed, so when the developers decided to add a futuristic faction (Forge) to a fantasy game fans reacted with outrage, threats of boycott and even death threats. As a result the Forge was scrapped and lots of developement time had gone to heck.
I, for one, am not against Aztec expansion (and believe that the scrapping of the Forge faction from HoMM was a mistake), but a lot of people are purists that do not tolerate this kind of contrast.
All I want to say is don't give up, the Aztec expansion must live if we're ever going to see that Dinosaur Strategy Game...