For 1 ->I'm not saying Naruto didn't had any effect of being their son. For being a Uzumaki Jhinchuriki's son his normal chakra level was huge even when he was kid and there should be some Minato's effect also. but without his actions and decisions his achievements can't be achieved. In chapter 670 sage of sixth path mentioned"... No matter how exceptional both parents are there's no guarantee one will inherit outright either of their abilities sound similar?? 

Just as it seems to have been in your case Naruto..... " So Considering fate was clearly on Naruto's side from beginning just because he was the son of Konoha's most powerful two ninjas and reincarnation of an alien is not fit well as neither it's showed in story that Naruto had special power because of being an alien's reincarnate Nor he was very good at every ninja techniques because he was Minato and Kushina's son. Even he was their son still he wasn't good at ninja techniques and was a failure who failed graduation exams three times and he was bottom of the class. So it was his hard work which let him succeed. So it's wrong that fate was clearly on Naruto's side from beginning Rather it like he made that fate on his side through hard work and his choice & decisions.