Check the
Slider Forums. Some of them have settings for all 32 teams to make them more like their real life counterparts. This would take care of most of your issues.
As for sacks, try:
- Manual blitzes form the SS/FS spot. I know it's a long way off but if the S is fast and you time a gap correctly you get better pressure than you think. I get sacks online like this regularly.
- Overload blitzes--i shift and slant the DL to one side and blitz a LB off the same side(I also run a 3-4 but i would imagine it works in the 4-3 also)
- Cover 3. I can literally call the same 3-4 Cover 3 Zone play every play of the game and get 1-3 picks and 2-4 coverage sacks. I do this for every online franchise game that I have to play against the CPU. CPU offense has never been able to consistently beat the cover 3 zone in madden.
- Middle blitzes. I will sometimes pinch the line (again, 3-4 defense) and blitz 1 or both MLBs and often get 1 guy in quick for a sack.