The stated purpose of the current approach to attributes is to eliminate "dump stats." I believe that the current approach has not only failed at making every attribute equally important for every class, but has also made certain stats mandatory for all classes.
Issue One: There are still dump stats, and there will always be, and perhaps there should always be.
It is practically impossible to eliminate cookie-cutter builds because there will always be an optimal build. And because the current system focuses damage output into only strength and dexterity, every other stat becomes a potential dump stat, depending on class and party role. For example, a wizard can dump intelligence (along with perception and resolve like everyone else) if he focuses on using only single target, direct damage spells. With proper positioning and tactics, even spells like fireball can be used to maximum effect without any intelligence at all.
Issue Two: The current approach promotes attribute homogeneity.
Because all damage and healing, whether mundane or magical, depends only on strength, all classes MUST max strength in order to maximize combat effectiveness. This is not a desirable outcome because having a variety of attributes is better for a party so that different party members can succeed at different challenges. Fighters need strength to increase melee damage, wizards need strength to increase magical damage, clerics need strength to increase magical healing. Every party, if built to maximize combat effectiveness, will have every member with maximum strength. Likewise with dexterity for all classes except healers.
