I am a CryEngine user, the engine provide complete AI Api support and editor AI functionnality. We can make characters behave and fight the player in a realistic way without too much effort.
You can learn more about CryEngine AI herehttp://docs.cryengine.com/display/SDKDOC2/AI+Control+Objects
What Xenko proposes about AI that would make us consider moving from CryEngine to Xenko for our next game ?
Hmmmm ... i guess Xenko is not ready about AI.
I hope this may help you.
Navigation mesh is only the ability to move from one point to another point, you didn't read the CryEngine docs ?
AI includes formations and team movement strategy, sensor and alerts https://www.youtube.com/watch?v=PR5gjP-Kk3s
There are many ways to achieve AI.http://aigamedev.com/open/article/halflife-sdk/
Xenko is nothing like the CryEngine. Xenko is a generic engine, not an FPS specialized engine.
So, obviously, there is not "Formations and team movement strategy" for AIs, because those are already specific things.
Xenko is also lacking a general AI toolset for any game purpose, like Behaviour Tree editor or a state machines editor.They have advantages 1 ) they reduce a lot the amount of coding, getting rid of hundred of "if then else" statements2) you get a high level visual view of your AI3) you have real time debug on your Behaviour Tree or State Machine.
Xenko is still young and progressing, of course it does not have all the features of an engine living for already several years.
Things will come and maybe people from the community may even make it available at some point!