If you first notice the red guy in the trailer, his AI pattern is bad, but he's a grunt so it's whatever right. Your lower level enemies aren't supposed to have that complex AI, it's just not realistic. Jump ahead to the big boss later in the trailer that you're fighting and he has the same sort of scripting, at least in the bit we've seen.
I can only assume from watching the footage the scripting for the boss is 'electrocute zipline, posture once then track player'. That's AI scripting you'd give to a grunt character, not a boss.
This is really disappointing. Bioshock had the same sort of issue that no critic seemed to address substantially.