When I say "fall", I meant "fall" a whole round (and I'm sure you did too) like Claussin or Mallet. Nassib will not fall to the 3rd round. If anything, he'll move up to the 2nd or even late 1st. Just look at last year's QB class. There were many that moved up into the 1st that nobody would have predicted to.
As for Aaron Rodgers, being picked 23 is not a fall. In fact, based on his college career, he was picked in the appropriate spot. And as someone else pointed out, Marino and Favre are from a much different era. The premium that is placed on QBs in the current NFL is huge compared to back then.