Progressions are irrelevant. It's about technique. If you have happy feet, are off-balance, and your eyes are spinning inside their sockets, you're not going to complete passes.
You can tell in the first two seconds if the play is going to go well. When AM's footwork looks good, good things usually happen. When he has happy feet, he usually scrambles out of the pocket for a sack, or throws off the back of his foot nowhere near a receiver.
Watching the first two games again, Martinez actually performed better than I expected. He had 343 yards of combined offense in the loss to Illinois. The O-line isn't doing him any favors, though. There isn't much of a run game, and he frequently has defenders in his face, disrupting that technique I mentioned.
Adrian isn't the kind of QB who can carry a team on his back, but he's far from Nebraska's biggest problem right now.