Yeah the punch resistance issue will always haunt him. I mean, as it stands, he has one of the worst chins I've ever seen. Seeing him wobbled from one of Prescott's jabs - and not a particularly stiff one either - was both ridiculous and worrying. Shit, even Malignaggi would drop Khan.
Still, I don't mind personally, it just means that all his fights are going to be exciting as feck. Even if he's completely dominating you know he's only one clean dig away from getting sparked out. He might even do a Cotto and improve his chin by moving up in weight... although Cotto never suffered from it quite as spectacularly as Khan does.
I dunno. I'm actually really interested to see just how much Roach has improved his defence because it was impossible to tell against a shot, one-eyed Barrera. Even then, Barrera still caught him once or twice with clean shots. Taking those shots from a featherweight is one thing, taking them from a natural light welter...
Like you said tho' Lance, his career from here will have to be carefully managed. Imagine what someone like Ortiz would do to him? Shame really 'cause he is a talented lad with (imo) the fastest hands in world boxing. He still has all the tools to have a good career, no doubt about that, but he's still going to get knocked out a few times.