I think they might have softened the personalities of every character during the the course of the EA.
They have. I can recall several points in the EA where I was going through conversation options and getting some really vicious or angry responses from some characters (can't make Astarion yell at you anymore). Those conversation options and their responses no longer exist, which makes them seem softer, more even tempered, but at the same time, you don't have as much opportunity to be mean to them, so it also applies to the player character.
