You get the Aztecs for free even if you don't pre-order, you just have to wait a few months, which I think is an awesome move on their part vs doing pre-purchase exclusives.
As a civ fanatic and someone who considered 5 best in series and played thousands of hours of 5, and based on how amazing 6 looks in dev and 'tuber vids, pre-purchase of digital deluxe was a no brainer to me.
I also like the fact that a lot of features, mechanics, and depth that would normally come years later via xpacs are there at release. Religion, espionage, deep diplo, trading, sexy UI, city state depth, etc. For civ and most 4X it's usually a stripped down base game that gets fleshed out via xpacs. Civ 6 is damn loaded right up front.
I think Firaxis is really doing it up for players this time around, kind of like how XCOM2 as so over the top sexy at release (IMO).
So yes, take my money in advance. No way I'm waiting a second beyond release to play this game. Aztecs immediately (which looks like a nice civ) and a discount on DLC I'll buy anyways is just gravy.
