Two things come to mind with all of this, including some BG3 derived rules in the playtest:
1) I don’t see why WOTC doesn’t just do away with the whole prepared spell thing for all casters, I mean, it’s moving that way anyway, just drop it. (And I say that as a player who prefers hard limits on stuff like magic); and
2) I think we‘re crossing a rubicon with the success of BG3, and how the things that players were able to do in that game will now become (for better or worse), things that are baked into DND. It would be a really bad look for the new BG3 players who then move to DND to try to do something they did in the game, and then be told ‘it’s not in the rules’.