And? Did they lie? They can love original BG and DnD, but still see them in their own way. Larian never said that they would comply rules 100%, Swen said this in his interview, they would do everything their own way. It wasn't a surprise.
Judging by the reviews in steam, BG3 is already liked by a huge group of players, but yes, these are more new players than fans of old games. By the way, these players didn't even play DOS. I've noticed that more often they come from other RPGs, like The Witcher or Dragon Age, it's definitely influence of cutscenes, сompanions and romance, not gameplay. Larian, of course, tried to attract attention of the old players too, but they never said that this is their main audience, right?
I don't believe that one can use "love" to describe one's feelings for something that one doesn't actually understand. So no, I don't believe Sven was being truthful when he said that they "love DnD" considering that they don't seem to understand the rules, or their significance to being what makes it "DnD".
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The cool thing we found is that a lot of what makes D&D, D&D, actually survived the translation, so I think that if you like Dungeons and Dragons and you want to play BG3, you’re going to be happy."
-Swen Vincke
https://www.pcgamesn.com/baldurs-gate-3/larian-interviewThis is a very inaccurate statement as it stands, since very little of "DnD" has survived Larian's attempt to translate it. He should replace DnD with DOS2, because the game is far more like DOS2 than it is Dungeons and Dragons.