He completely dominated the fight and won every round. People are grasping at straws just to discredit Khabib for not mauling him.
I think that's because Khabib had 1 day to study Al Iaquinta's tapes, and 0 days to actually practice technique to counter him (you don't spar in the final moments at risk of getting injury). You think he was ever watching Al fight before last 2 nights? He's been studying Tony and Conor extensively. Tony also has a different build than Al. He's lanky, meaning it'll be simpler to slip in a submission around the neck whereas Al's neck is barely there and Khabib struggled to sink it in. He's also taller, so he can't crouch down like Al did to minimize takedown attempts.
This fight does give people some false hope, which is good. Maybe people will be interested to challenge him for once.