It's a tough decision on that one, the route was schemed correctly there IMO they caught Bama playing in their normal soft zone coverage and exploited it. Something I've said needs to be addressed. Sometimes you have to look at where you're successful in a game or across a season, our defense is much more successful if we pin our ears back and go after the QB/RB and force 3rd and long and keep the pressure on. Will we get beat deep and on some misdirection some? Sure, but we'll ultimately be a better defense if we disguise coverage and blitzes more and force the QB to make quicker and tougher decisions with the football.
While I agree with Roman, Malachai is responsible for that player, it's not black and white there. That's a scheme issue not a player issue. He's taught to take the person entering his zone, which is the seam route. The defender underneath is taught to take the out route or post that turns into a wheel until it gets to the deep 1/2. The issue is that Malachai can't cover the ground between his receiver and the far receiver in time to make the handoff. So if he leaves the middle receiver and covers that deep half there, he likely leaves a wide open guy over the middle, unless Sabb is fast to react to the change (Which he doesn't move fast enough to do so). The question you gotta ask yourself is "Is that what he's coached to do?" or is that a decision he made himself? I believe it's a coaching scheme/fit. In that situation 4th and long, once again we always like to run that cover 2 zone scheme and South Carolina knew we would be in it, they dialed up a play for a TD. The QB even stared down the receiver but because it wasn't man coverage nobody stuck to him and we got beat because 2 receivers occupied a single deep zone. Unless we cheat the safeties over there pre-snap and change the way they guard the zone or unless we play man in that situation which is my preferred option, we are going to get beat there 9 out of 10 times.
Which is why I've been beating the drum of manning up on 3rd and 4th and long situations and playing press coverage or at least if you're wanting to do zone. Disguise it as man coverage and have 6-7 fake blitzing on the line and have them drop. The QB will likely take the hot route and you will tackle him 3-4 yards short of the line.