I agree. People forget that the new minority characters just don't do as well. And the old ones just don't have that "magic" of a Sipiderman, Superman, Batman etc ... At best, they are either not as heroic (Blade, Spawn) or they are more of a side character (Storm, Falcon, Luke Cage). They really tried with the Milestone characters and the like, but they didn't catch on as big as they needed to (after all, we have to be twice as good to be get just as much).
And, if they want their headliners to continue to be at the top, those characters must evolve to like the emerging populace. These characters have to get browner and less male. They have to be made into the readership's image as that readership changes. You know, like how white people changed Christ to look like them.
As long as they tell good stories and don't "hoodmatize" the black and brown versions of these characters, I'm all good with it.