Should the enemy ai be of any concern?

After watching a few videos about the campaign, something stood out for me and that was the enemy AI. especially after hearing one of the players say they were playing on heroic. The brutes look awesome and the boss battles are exciting but i also noticed that the elites seem to lacking that “swiftness”? agility? jackals and grunts arent as aggressive as i had hoped?

basically, i have mix feelins about it but i could just be overtly paranoid right now lol
here’s a link that goes more into my thoughts. what do you think?
there’s a video on my youtube channel if you’re interested. can’t put links so name is: