"Gameplan adjustments" needs an overhaul <-- I posted a suggestion on what to do with Gameplan in the wishlist thread.
The existing gameplan adjustments don't have to be scrapped in a sense, but merely embedded into the player's attributes giving them more unique identities of whether they're a playmaker or simply a role player - actually bringing the player tendencies to fruition. For example, why should a run stopping tendency DL-man have the same Jump Snap advantage as a pass rushing tendency DL-man? And what does jumping a snap have to do with a gameplan? Coaches ideally would like their DL-men to get off the ball quickly all the time.
And for coaches specifically, playcall aggressiveness should determine the zone depths and option defense from the current gameplan adjustments. This is such an important slider because it would give coaches a unique identity as well. Zone blocking, man-to-man blocking, or a balance of both; this could go a long way with offensive playcall aggressiveness. For example, if your coach is aggressive, he'd run a zone blocking scheme. Man-to-man would be conservative. Balanced would include both.