I fully agree with you. The thing about it is the reason why I was able to put up as many points as I did, was due to me having three interceptions (which were all user controlled), Avery putting me into scoring position every time he had a return, and the dumb play calls by the CPU on third and long. Three times I was able to pull of a huge gain because I knew the CPU was blitzing, all three times I should not have gotten the first down but I can't do anything about what the CPU calls.
I obviously adjusted everything accordingly but I can't do anything about punt or kick returns, they're just too damn easy. The only way to really adjust it is to raise the speed threshold so that a player like Haynesworth can catch up to Leon Washington, because that is basically what All-Madden does for the CPU.
I've compared my sliders to most of the ones currently out and it seems as though mine, for the most part, are harder than anyone else. Try it out for a game and tell me the results, maybe you can assist me in creating realistic sliders!