You guys are trying to eliminate one thing without keeping the game balanced. Too many things have to be sacrificed to fix sacks.
About what the sliders do, well hardly any of them really do anything, you're better off leaving everything at 0 besides QBA, WRC (CPU), PRC and PCV, even PRC is good at 0. I have tested these and it seems the entire difficulty of the game as well as how well the players perform is dependent on the sum totals of the sliders. So if you have QBA at 75 and WRC at 25, that is 100, which plays entirely different than if you have QBA at 50 and WRC at 35. The difference includes RBs, WR/CB interactions, Blocking and so on.
With QBA at 75, I avg 2-3 sacks per game. If I lower it to 45, I get 5-6 sacks per game. It sounds dumb, but that's what I've tested.