I think we saw the scale of the transformation Virgil Hunter is looking to do - footwork, defence, shot selection - it's going to be a rebuild rather than refinement.
His analysis of Khan's decision making in the ring was interesting - he pointed out his foot movement was often taking him either into range or onto the ropes, something a few on here mentioned if I remember.
We also saw that it is probably not going to be an overnight success but a gradual process, Khan struggled to get some elements of it and without seeing the sparring, Virgil seemed quite agitated with Khan, as if he was struggling to put it all into effect.
I was impressed with Molina too.