I really hope they can just mix editions and use the revised One DnD stuff in BG3. Barkskin is a good example. Dual wielding is another, even better. And there's a lot more. Who cares about the "purity" of an edition if the game plays better?
Realistically, I guess there won't be a revised BG3 One DnD edition until it has been locked down. But already I hope there will be one asap.
