VioletEyedDragon (Level 19)

According to filmschoolrejects and screenrant, Blake Lively was slated to appear in Steven Soderberg's SIDE EFFECTS, but the financers didn't want her for the role. She has been fired and replaced by Rooney Mara. Now I get if they wanted someone more experienced, but the way it was reported it seemed like they thought she would be bad. What would make them think that? Has she done anything wrong?