It would be cool but from what I can tell the game is a departure from the old titles and being marketed to a new audience.
Honestly, if that were the case than the game wouldn't be called BG3. As that would inevitably have people wondering (and perhaps even buying/playing) BG1/2.
It's also how you market a feature. It doesn't have to be heavily marketed, and not displayed as an option very visibly in the character creation menu. And I think an 80/20 implementation would make many people happy.
