Does blitzing actually result in a higher % of sacks? I noticed that when I blitz, if I get a sack the blitzer is likely to get the sack. However, I blitzed every single play for two seasons and I think I actually got fewer total team sacks than when I just let the DL rush the passer, or bring a LB down to the line.
I agree with Robust_Trex. For every play, there are not 22 different AI's performing a football play based on the settings we choose. If I tell my team to blitz 100% of the time, then I'm sure there is a blitz modifier added to the play 100% of the time. A computer program doesn't know to do otherwise, it doesn't just not add a blitz modifier even though the code said to add the blitz modifier.