I think the confusion and direction of Alexander made a lot of sense. Worf, from a young age in a strange land, was brought up with younger parents and devoted himself to all things Klingon with a level of dedication that could have rivaled any child on the homeworld-- if anything, his situation carved him into a great warrior and wise, balanced officer. Alexander's childhood was a little more difficult. Mother, opposed to traditional Klingon values, dies suddenly and horrifically-- with a father casting a HUGE shadow who shuttles him off to Earth to be raised as a human. Caught between worlds and confused, he eventually decides to serve on a Klingon ship, but he is already YEARS behind where the other children would be. Before Alexander would ever become more like his father, he would undoubtedly go through a very awkward and difficult period of adapting and dealing with the disadvantages of his youth. I really liked the episode where he serves on the ship with Worf. I always felt like they put a lot of thought into Alexander's dramatic jump in character development.