Since they said they planned four DLCs for CKII, the fourth one better be damn good and jam packed with content and expanded mechanics.
This Aztec thing seems like a bloody waste, driving a wedge between the community and slowing further development of the game.
Can't you leave the ridiculous alternate history scenarios to the modders? Aztecs couldn't sale when Cortez discovered them, and they sure as hell couldn't sail in the 14th century. Aztec weapons were composed of wood and obsidian, and would only break upon contact with anything tougher than leather. In fact, the Aztecs weren't even a power in Meso-America until after the events of CKII