I'm glad to hear you'll be playing the EA. I'm guessing 99% of the people who play the EA will be those who are already gushing about the game and at most have only minor issues with the game. So it's the feedback Larian receives from the other 1% that will truly help improve the game.
Yes, for some reason, EA doesn't tend to get a lot of players who go "I hate everything I've heard about the game, I hate the mechanics of the game, I hate the look of the game, I hate what I've seen of the characters in the game, I hate all the games made by this previous company, I hate that the rock textures remind of of a different game I hate, and the only way I would be happy is if they scrapped everything and redid it to my tastes, but I'm absolutely going to plunk down $60, no refunds for an unfinished game I don't like anything about".
However, as someone who has played the EA/beta versions of Larian's previous two titles, your ridiculous strawman along the lines of "All EA players are brown-nosing fanboys who are guaranteed to love everything and have no complaints" is not even remotely close to what actually happens. EA/beta are full of tons of complaints and suggestions for changes or improvements. Game design is iterative and rarely is everything perfect on the first attempt. That's why testing is done, that's why Larian does these EA releases.