The chances of Team A getting a positive result after being the first to touch a scrimmage kick in their own end zone AFTER it has crossed the NZ are slim and none. They won't be able to advance the ball, so, if this touching in the end zone is a full catch or recovery, the ball is dead behind their own goal line, and the impetus is with their kick, so that's a safety. If they first touch the ball in the end zone and it subsequently travels back into the field of play where they recover it, again, it will be dead at that spot, and B's ball.
The best Team A could hope for is if Team B touches (muffs) the ball after A touches it in the A end zone, and then Team A recovers in the field of play, and they'd get a new series. What are the odds of that happening? Very poor. Technically possible, yes. But not a coachable result.
So, nothing really wrong with that rule, until that happens, and a Big 10 team loses to any other conference team in the national championship game. Then Dulaney will get the rule changed, and try to make it retroactive, and have the championship game ruled null and void or something. Yeah, he's retiring, but, let me assure you, he would spearhead that effort, if it were to happen.
Robert