I noticed last night he doesn't really have any. A lot of lateral movement and circling but no real head movement. Made me think if he's ever really moved his head or if it was just last night
His head movement was very good last night actually you should watch it again. Also his footwork has improved a lot he makes the right steps at the right times. His biggest problem is the major lapse of concentration and then getting caught flush.
His biggest problem is the fact he isn't elite or top tier. He's a good but very flawed fighter and it shows when he steps up to that level.
Just stop it. Khans defense has always been his offense, the minute he stops punching he gets taken apart. Apart from pushing opponents and turning his back on them, Khan has no defense whatsoever.