Oh, no, please. The last thing Donna needs is more retcons. (I'm not even sure where she's at right now - the consensus seems to be "raised alongside Diana," but why or how is still up in the air AFAICT).
In a less specific sense I agree it's pretty cool, though. I have my issues with the glaringly asspull way it was done, but in principle, I really like Grace as a Bana, for example. And the statement in Jimenez' run - that the Bana weren't alone, that there are other lost tribes of Antiope Amazons out there - just leads to all kinds of interesting things I'd like to see explored. Where are the Norse Amazons living on some secret island protected by Freyja's perpetual sea storm? When do we meet the amazon keepers of Shangri-La? Is Quetzalcoatl not still worshipped in some hidden corner of the mountains by a strange matriarchal tribe with traces of ancient greek in their language? If nothing else, it would be a nice way to add to the amazons' perpetually dwindling population.