I felt he put too many rounds away early in the fight to lose it, but I see two things with Amir Khan.
1. This guy has tremendous heart, I think he redeemed his chin a lot this fight, and he better speed than Mayweather or Pacquiao, I was flabbergasted by his speed.
2. He still has all the same problems Pacquiao does, without the big power or incredible stamina. He covers up on the inside and doesn't tie up, he is only effective offensively at certain ranges, but he also only effective defensively at certain distances as well. If you fought Khan at the right distance you could probably get him to not throw a punch the entire fight, and you could land at will on him. THe one thing that he doesn't have that pAcquiao does is that Manny always punches back right away.

If Khan is going to stay with Roach, he will really have to start working on even better stamina though I thought he was in pretty good shape, and he needs to really focus on defense because Manny has otherwordly skills in different areas that allow him to fight this way to effectively against almost anyone. I've seen many Roach fighters fight in a similar style, but only Manny has really dominated consistently with the hoping in and out combination style.