To be honest it does show that they're 8 months away from release. I could spot a number of situations where the A.I. was basically non-existent (staring at a wall doing absolutely nothing, conveniently to show "stealth" approach, or a guard actually looking in the direction of another guard barely 5 meters away being taken down "silently" but having zero reaction to it whatsoever, etc). Also, the talk about dynamic ecosystems and A.I. critters in the environment having their own routines and needs... that stuff I heard it all the way back with Shadow of Chernobyl (the "A-Life" system), and it wasn't exactly the way they portrayed or described it (only mods would vastly improve on that, especially one for Call of Pripyat).
The thing is I take everything with a giant grain of salt whenever a developer says they have any form of "intelligent" A.I. behaviors in their game. If there's one thing in the gaming industry that probably moved just about an inch in 20 years of progression it's definitely A.I., which is usually on the cognition level of a cockroach.
Now, with this said, the atmosphere looks good, and I like the game's setting. I never played the previous Metro games, but Exodus could be my first. We'll see in Feb. 2019.