Sorry for my bad english 
I wanted to ask, did the aliens act smarter?
Usually AI acts very straightforward.
Yesterday I launched the mod, just to get a first impression.
It is interesting 
Yes, there are some significant improvements to the AI. Off the top of my head:
1) AI units can properly use weapons with limited range (like flamethrowers).
2) Some (not all!) units are able to use "squad sight", which means shooting at targets they can't see but they, specially trained friends can. This generally applies to the aliens and highly trained humans. However, their accuracy when taking such shots is halved (the same applies to player units).
3) Some (not all!) melee units use the "Leeroy Jenkins" mode, which means they will always charge and disregard their own safety. This applies to zombies, for example.
4) Not exactly an AI feature, but related: some units (both AI and player units) have additional vision modes, like psi vision. This may give them the ability to spot you through walls.
I probably forgot something important.
