That line explains why you get so many sacks. Pressing the X(dive button) activates a sack animation in which the QB can not throw the ball away and is automatically sacked. It can also be used against the run game and can make a RB do a "trip" animation in which I have yet to find a way to stop it. IMO this is as bad as the RC and nano blitz.(Grant it the QB does throw stupidly quick if any type of pressure is applied)
I still dont see why people say lay off of the sprint. If I am playing DE I can still get off almost instantly with a move while I hold sprint and I arrive at the QB at less then 2 seconds if I have a player who has 80 in either finesse or power move.
They need to tone down the dline responsiveness and win percentages from the user control and improve the AI in which the CPU controls your Dline to make them perform better. I will normally see a sack from the other 3 Dlinemen even if I have Mario Williams, Kevin Williams, Tommie Harris, and Robert Mathis on my line. A line like that IRL would easily rack up 50+ sacks.