In a sense, you should know the roster of the team you'e playing with. Same goes for knowing the team you're playing against.
I, for one, am not for the indicators, at least on a expanded level. I don't need to have numbers under EVERY player indicating his rating swing, along with a hot/cold icon, and his confidence. The hot/cold icon would be enough, as it would let BOTH sides know who's hot and who's not, and it would also put an added strategical element in the game.
Do you roll the coverage towards a hot Calvin Johnson, knowing that the Lions are limited and unproven elsewhere in the passing game?
Do you load the box against a hot Chris Johnson, knowing that the Titans have a young rookie in Jake Locker at the helm? What do you do if he rings off 5 consecutive completions, putting him in a rhythm? Would you back off? Would you bring heat, which could open up lanes for CJ?
I could see WHY indicators are necessary, not only for the offense, but for the defense. I actually think DDP will appeal more to us hardcore/sim gamers, as I know my casual gamer friends won't care much. So indicators would go a lot way if added CORRECTLY. Limit it to a hot/cold icon at the LOS, and maybe somehow tell us if a guy is nervous or riding high.