Before EA was released to the public, Swen said that they started with a 100% faithful adaptation of the ruleset. They should have released the version that was closest to RAW for EA instead of the ~50% version we got and worked from there together with the community to see what actually works for a videogame.
There was no 100% faithful adaptation which was also in end-user-playable form. That much is clear from what HAS been released. There are only a handful of classes and fewer sub-classes, many missing spells and mechanics, missing races, missing features like Expertise, and so on and so forth. Whatever they did have might have been rules-faithful, but it was only a partial amount of the possible game space. Even then, it was pre-alpha and thus unstable and not correctly working properly.
Also, games can't be developed by committee. Larian discovered this when trying to write the D:OS 2 Origin stories. Everyone at Larian could contribute ideas, but too many cooks spoil the broth and it had to be pared down to just writers in order to actually get them finished. Democracy doesn't work for development, a direction must be chosen and that enforced, otherwise it spins its wheels and gets nowhere.
