Even Linares himself said that Loma wasn't even hurt by that punch, a rare second of poor footwork from Loma caused him to go down
If he wasn't hurt he wouldn't have fought in survival mode the following round. The minute break would've been more than enough.
I'm a big Loma fan but have a hard time seeing someone smaller than Floyd beat him. Outside of total freaks like Duran or Armstrong. Floyd was too damn good at using that reach advantage to control the action. It's a testament to Loma's skills that he has made it as far as he has while lacking reach, power, or even elite speed.