The 10€ DLC iirc only has content that references their past Divinity games, I feel like it’s one of the fairer DLCs, given that it’s completely innecesary for the full experience and might even detract from it for non larian fans. I feel like it’s better to give it as an extra purchase than include it in the pack.
Full disclosure I backed/preorderd the game the moment they announced in kickstarter and I have gotten it for 40ish euros iirc, and I got the DLC content for being an early backer. I don’t usually preorder but it’s Larian, they always overdeliver, and this time they did also, while raising the price of the completed game because they overdeveloped the initial concept way too much lol.