I think that's a common trait of every stealth game though.
AI is made stupid on purpose of course, so you'll always have ways to exploit it, from blind guards in Chaos Theory, to body luring in Hitman (and many others).
In LoU2 the enemies often use not-so-obvious path finding, try to flank you regularly (at least on hard, i dunno at lower difficulties) and of course have all those flavoring elements like personalized phrases and behaviors that add humanity (and i count under the AI umbrella, since that's essentially what it is).
Although AI is kind of a thorny topic, because the balance between letting you win, and fooling you into thinking the enemies are smart, is not just a technological challenge, but largely a design (and to a degree subjective) one.