Correct.
Corrente says that ASJ fumbled, meaning that he was a runner, having previously completed the process of the catch. Further, he explains that ASJ was neither down by contact nor in possession of the ball when it crossed the goal line. He grasped the ball while falling to the turf, but during a fumble recovery anywhere on the field made while falling to the turf, you have to survive the ground. He did not, so he did not regain possession. No TD.
At that point, it was still a live ball. It then went out of bounds before he gained possession, hence it was a touchback.
That's the only way I see Corrente's detailed explanation making any sense at all. Both factors are relevant: surviving the ground and if that does not happen, someone, anyone, gaining possession while in-bounds.