I don't have a lot of experience with Larian games (and with the experience I do have, the fact they were trying to be funny went right over my head and I took them at face value) but while I agree with you that funny is apparently their brand, you can still have good and bad versions of that. And I do wonder if this is actually a good version of Larian's thing. The story they're trying to tell seems to be straight-forwardly serious. Not devoid of humor, but with humor suited to the moment. And the mechanics I don't think really meshes with that. With Taika Waititi fans, there are gonna be movies where they pull their style off well and where they don't. But then, who am I to judge? As I said, I never even knew they were trying to be funny in their games to begin with. Hell, I really don't know anything about Larian as a studio. Until a few months ago I didn't even know they made all the Divinity games. I thought they were a somewhat new studio that got the license for the setting after they had formed and made Divinity: Original Sin as a reboot/one of their first games.
Really the problem is that people came in wanting Larian to conform their style more to the beloved franchise than for them to conform the beloved franchise to their style. I for one don't have any particular reverence for the Baldur's Gate games, having never played them myself, but even after D:OS2 scared me away from them, the name specifically got me to give them another try. I'll probably end up perfectly content with the final game, my real worry is that more crpgs will get made in this style and the result will be fewer crpgs in the style that I like. I don't want this game to set precedent, and so many people are singing its praises (for reasons I genuinely don't get) that I fear it may be inevitable.