I mentioned earlier that we might have to look at playing All-Madden this year. I take it back. :lol Yeah, the defense improves a little, but the OL goes to shit. It's not so much that the defense is playing that much better, it's that your OL stops giving a shit. The OL goes to shit and stops blocking people. Half the time, the DEs go in untouched. The run blocking reverts to frustration mode where your guards, fullbacks, and tight ends no longer feel like blocking anyone and sure as hell don't want to block downfield.
Of course, this would all be moot if we had sliders, but I'm pretty certain that it's impossible to put sliders in a franchise mode or else some other sports GAMES would have done it already!