I was disappointed that Saul didn't manage to make one of the lenses of his glasses into a stabbing tool to kill Haqqani when they were in the back of the car, or find a knife on the table to stab him with when they were eating, but I guess he cares more about preserving his own life than about trying to kill Haqqani.
I noticed that Haqqani's son was right next to him when Saul said, "You executed your own nephew", and I'm sure that is going to be significant. With Aayan dead, they need a new teen character in the show, don't they?