I don't mind Anduin tbh. His father has always said he was more like his mother, so his softer more peaceful nature makes sense. Its the reason he has always been drawn to those of the same ilk ( Baine and Jaina ). TBH this story reminds more of the old David/Solomon story from the Bible. David was the father, he laid the ground work for the King that would truly do great things, his son Solomon.
Anduin is a priest, and for me at least, its nice to have a character that is not your typical Warrior class. Also keep in mind that while he is wise beyond his years, he still is a boy, and him being a bit naive makes perfect since.