Nellas, the reason why I didn't consider that romantic element the worst change, was because once they DID make the change of turning Caspian into a young adult, it really was not so unreasonable that some attraction could arise between him and Susan. On the other hand, in a society which already programs young people to despise teachers, mentors and honorable role models, ruining the character of Peter on purpose to make him UNQUALIFIED to be a mentor to Caspian was throwing gasoline on the fire. That was by far the worst thing Adamson did.