I don't think thre's a problem with Owen being Obi-Wan's brother, but I don't know about the Anakin being Han-like, either. I think Anakin should be his own character, not a copy of another character from the OT. He needs to be a compliment to Obi-Wan, the kind of person that really WOULD be a good friend to him. He also needs to be an incredibly gifted pilot and fighter with a very strong aptitude for the Force, but just a little bit reckless, to the point where he'd rather fight his way through a problem than be patient and figure out a peaceful solution, which is Obi-Wan's forte.