Definitely not a game-breaker, but when one of the main bullet points of Patch #2 was improved sim stats and nearly every running back breaks multiple 50+ yard TD runs every single game, that's a problem. When the sack record is being obliterated every year, that's a problem.
Because the franchise mode is relatively bare-bones, the big selling point of it is all of the stat tracking it does. But when the stats are so hokey, it really diminishes that aspect of it.