Another thing that needs to be up front (and quite possibly has already been stated in this long thread) - WoTC is constrained on the mechanics front.
Every rule, every revision, has to be weighed - does this stray "too far" from "D&D" and if so, no matter how "good" it is it likely can't be used. What's "too far" that's likely a know it when you see it standard.
Every rule, every revision, has to be weighed - does this stray "too far" from "D&D" and if so, no matter how "good" it is it likely can't be used. What's "too far" that's likely a know it when you see it standard.