Khan definitely has a ton of heart, I agree. It's something that many people fail to mention when mocking him, interestingly enough.
Khan is a young warrior, just if God gave him a good chin, then alot of fighters would be bang in trouble.
Roach applied the game plan Pac used against Dela Hoya. Anybody who watched it live will see it. Khan had the same moves Pac used, even lifting both hands when getting hit. The In and out movement. But it all went well with Khan's superior speed and handspeed. He evaded most of the shots by speed alone, Yes his chin wouldn't hold out long though. But he gave Barrera a tough time, Khan has reach and handspeed which Barrera could not cope up. Let's give Barrera a credit though, Even an aging fighter cannot be blame if he still wants to continue. And don't blame the young guns if they want to pit themselves to the legends. Isn't that what you most of guys want right?! Young ones to prove themselves upon the proven.