The funny thing about the Instinct Mode in Absolution is, that it has almost nothting to do with any sort of instincts.
Comprehensible instincts would be:
Taking the measure of someone if he suspects me. (already implemented)
Dodging melee attacks (already implemented)
Something attracts attention, that doesn't fit in the current situation.
Something attracts attention, that could be a useful item (already implemented)
Knowing where the target is by concluding, that the number of guards is higher or the security system is more advanced in a speacial area.
Noticing bumps in clothing which lets you know that this person has a weapon (but shouldn't have one)
Body lenguage and physique: Knowing, that a hot dog salesman (for example) with crewcut and muscularity could be an enemy in disguise.
Drawing your own conclusions from the behaviour of people. For example: Indicators of alcohoism, hetero/homosexuality, wealth, military training etc.
If they implement things like that, so that your instinct helps you to have some advantages acomplishing the mission, I would appreciate that.
But if they use the instinct mode to give us supernatural abilities, they can keep it.