Khan's stock seems to be inversely related to his improvement: when he's doing well in fight after fight, it slows down; when he struggles or gets KD/KO'd, he improves dramatically. His stock has gone down quite a bit, so I expect him to improve quite a bit. Hopefully, he'll look at some of his Roachisms (standing straight up inside, bouncing rather than moving, having his elbows out of place etc.) and iron them out.
I think he stayed about the same. Sure people expected a dominant performance, but it's not like LP ran away with it. It was a good scrap and in the end isn't that what we should care about most? That he provide us with entertaining fights? Plus, if he wants to get ready for Mayweather he's going to damn well need tough opposition and Lamont, though he's certainly no May, is a good start.