I'd be fine if Larian improved the mechanics, constantly iterating on making a better and better D&D engine and put out new modules using it. Ditch the Baldurs Gate name and mythos, and implement existing D&D modules with their engine. That cash cow could milk itself, and every D&D nerd out there would be in heaven
I've said this to the folks I've played BG3 with. I don't even care if the one-off campaigns aren't voiced or just narrated by one voice. Just release the standalone adventures and I will buy them all.
They had to use an existing IP that's famous among anyone that's old enough to have been playing games 20 years ago to get this success. Even with the Divinity games under their belt, the BG title made lots of people take notice.
Now they can probably start doing big original games, but it's going to take a long time to build that kind of setting from scratch. Like, years and years of writing and they still won't have the depth of BG3 for a couple games.
I'm sure if they do it, it'll be good. But a completely new IP is going to add a lot of time to development