Swen's a great guy and I'm sure he knows what he's talking about when it comes to BG3, but I at least still intend to play my way, regardless of this interview. Larian has been pretty insistent that that's what we should be doing all along.
I'm not convinced custom character is that much of a lesser experience than Dark Urge/Origins. I actually think it's potentially more interesting even as it seems we get to sculpt our path more. For instance, early on we can apply the Baldurian tag to our character via conversation... or not. Maybe there's an option to be spesific about other places we're from later on too. Meanwhile Gale will always be from Waterdeep, Astarion can never not be from Baldur's Gate and the Dark Urge will always have to have done something horrible previously and potentially not have the option to not do horrible shit again here and there. With how much the devs have boasted about crafting our characters' identities and making choices that meaningfully change the story, I feel it's fair to assume we'll see that going forward even as custom characters, even if we haven't seen a lot of that with our limited exposure to the game from act 1.