I disclaimer or apology note is right, but I warn in a few years we could find with complains against Lovecraft because he was racist, or far-west moviest where the native indians are the antagonists....or movie of pirates where the Spanish empire are the bad guys.
We hear complaints about Lovecraft and Westerns right now, and we see people casually replicating the problematic parts of Lovecraft and Westerns in modern works. You don't seem to understand why people would complain about those things and not generally about movies where the Spanish empire is the bad guys.
Why not a disclaimer for the books of "7th Sea" what talk about the Vatican church?
Why a disclaimer for those books?
This points out a problem with the disclaimer to me; putting it on everything means that it's not clear that WotC knows what was problematic about some of the older works, and it doesn't make what is problematic about those older works clear to the readers.
Racism is wrong, here everybody agrees about this, but if we really want a better world then we have to defend the respect of the human dignity, the base of our citizens as people. We have to take care with the right strategy because if other feel there is a try to manipulate emotionally throught the feelings of guilty and shame, the effects may be totally counterproductive.
What I've been hearing is that people are tired about having to tiptoe around white people's feelings, of white people getting very fussy when simple truths are being said.