That may be the case if your playing in all-pro where the idea of difficulty is to make everyone play as close as possible regardless of attributes. But if your difficulty setting was in rookie per se or maybe even pro than the effect of the attributes might resonate higher than the mere 5% you claim. Numerically on the attributes it appears as five but if the difficulty or slider is changed than it may increase or decrease the margin in game significantly.
A way to find this would be to start the game in all pro and make a copy of the data. Then change the difficulty, and make a copy of the data and compare the two to find the variance and location of slider/difficulty code. Is that possible within the hex-editor for it to locate changes between two sets of a file? Can two files be loaded simultaneously like explorer tabs and then compared to each other for locations of variance?
With this idea we can now increase or decrease player performance beyond the limitations of the slider possibly. Thereby altering CB play to cover supposed cheat routes better. Maybe, if the roster file contains all necessary data this could be a very real possibility. Or can we edit the setting file through a hex editor? has anyone tried?
If we could edit settings file maybe we can find default team playbook files too?
Just throwing this out there for anyone interested but will get to it myself after today. Too busy with life at the moment.