You can customize the class i think here is from the dev
This is our campaign, but it's absolutely your adventure. The small amount of gameplay we've shown focused on one of our Origin characters, but whether you roll a custom or Origin character, the choices you make and the actions you take carry the same weight. In Baldur’s Gate 3, ‘Origin characters’ are basically fully-fledged companions, that you can optionally play. Even if you’re not playing as an Origin, you can explore their backstories and personal quests by having them in your party. Custom characters will see the world react to them based on their chosen race, class and background. Creating a character gives a sense of who you are, but the heart of the game’s reactivity is based on what you do after character creation.
After you select a race and a class, you could be all set and ready to go, but if you want to, you can dive in deeper, and change all the abilities, spells, skills, cantrips… and customize visuals. You will be able to select a face type, hairdo, facial hair, skin colour. I cannot give numbers or details, because it's still a work in progress, but there won't be sliders. We have more diversity in creation than in any other game we’ve done before. You'll be able to mix and match a wide variety of defaults, to create something unique.
Yup customize will be a thing in BG3 I was just showing people who did not know what classes and subclasses there will probably get in BG3 I think it is going to go down the same way that Pathfinder Kingmaker has done you pick your class and your subclass and than you customize your facts
