With everything that's been said about Batgirl specifically, and the New 52 generally, being too dark, and not for kids anymore; what would you think of having graded continuities like the YA/General Fiction delineation? I think this would allow readers

See, this sounds okay to me, but again, remember what I keep saying, the customers for publishers are retailers, not individual purchasers.

And as a rule, retailers order VERY cautiously on all ages books (with few exceptions).

So it’s risky.