I used to run CPU vs CPU Games in Madden 12 and just watched them, because I am an crappy player. I'd rather play the GM and build the team, including hiring coaches. Unfortunately EA took that away from us.
That's why I like these sliders. They give even a guy like me a chance to play the game, although I would like to just sit back and watch.
Some finetuning and the sliders will work just fine. The reason why I upped some of the players sliders is, because tuning the CPU sliders would effect the simmed CPU games, wouldn't they?