Well in the 35.min gameplay the bandit with the shield didn't stay only blocking he attack Geralt various times so they AI of the bandits are not as simple as the AI of the enemies of batman and AC, and we are only talking about bandits i think there gonna be more advanced enemies and with a more diverse AI.
well obviously the shield guy attacked. in any type of AI an enemy would attack. otherwise what would he do there? wait to die?
the point is more about defense and reactions and less about attack and initiative. the pattern enemies have usually one attack and one reaction to being attacked. usually they have one type of attack and when you attack them they always react the same - either get hit, block or dodge.
skyrim is an example of AI that isnt pattern based. they have a pool of moves they can do and they react from that pool differently every time.
a shield enemy in skyrim might block, might bash, might strafe, might just get hit, might attack, might power attack..... skyrim's enemies are not that sophisticated without mods but that's the general idea - they are not predictable.
batman or shadow of mordor have enemies with shield as well but this are very pattern based - they ALWAYS block, you can NEVER counter their attack, you HAVE to jump over them and attack from behind. such an enemy will NEVER suprise you. NEVER behave differently. NEVER require a different tactic. attacking with the "roll over and hit from behind" will NEVER fail. everything is very binary. very static.
what we've seen in the aformentioned witcher 3 video seems like a batman kind of enemies - the enemies without the shied NEVER blocked. the enemy WITH the shield ALWAYS blocked. to kill him geralt waited for a counter which disarmed him.
so im wondering if there is another clip that shows a behavior that isnt static. patterned. predictable....
also, im not talking about beast and moster AI because it makes sense that enimals cant counter, block or parry. they just attack. it's more obvious that they will be predictable offence based kind of AI.