Into the fray I suppose. To be honest, I also see Sasuke's new version of Susanoo as a hand out. You cannot deny that if Sasuke gets any sort of Senjutsu then it is a freebie since his chakra reserves are not quite as plentiful as Naruto's. It's the whole claiming to be the next Hokage thing all over again. Naruto is an Uzumaki which entitles him to vast chakra reserves ASIDE from Kurama.
Now, I will admit that having Kurama has become one of the greatest gifts that could have been given to Naruto. However, what the OP has stated in the thread about Kurama originally hindering Naruto is true. Remember how Naruto has poor chakra control? Well it has been pointed out by Jiraiya that it was due to the Nine Tails. While Kurama's chakra and Naruto's chakra could be mixed, it was an unstable mixture which resulted in Naruto's poor chakra control. Add to that the fact that Naruto had no parents to teach him jutsu and you end up with a hard working individual who has struggled for every "freebie" he has ever gotten.
Let's refer back to Sage Mode itself. Naruto, unlike Jiraiya, could not fuse with Ma and Pa Toad because of Kurama. Kurama even admitted that he kept Naruto from fusing with them. Thus, Naruto had to go through the extreme rigors of Sage Mode training in order to get to where he is at while Sasuke is literally given the ability by Juugo and (originally) Orochimaru. The fact that Naruto has a new power-up that uses SM is irrelevant due to Naruto's new found friendship with Kurama.
Now, how about we discuss KCM and EMS? KCM was a hard fight for Naruto. He had to fight Kurama in order to split him from his chakra. It was later explained that Kurama had replenished his chakra by STEALING from Naruto's chakra reserves. That lends to Naruto's heritage because Gyuki said that Naruto should by all rights be dead if he weren't an Uzumaki. Kakashi has referenced as much throughout the series as well, but that's a different point...back to KCM. Yes, it's true that Naruto would not have gotten the power up if he hadn't been helped by his mother to some extent. BUT, the point here is that he still had to fight for the chakra and then had to prove his worth to Kurama in order to get BM. Sasuke on the other hand was essentially handed his EMS powers. Itachi LET himself be killed by Sasuke. I'm sure we can all agree that if Itachi had been at full power then he would have defeated Sasuke, maybe not have killed him but definitely would have beat him. Everything Itachi did was so that Sasuke would become powerful to protect the clan's reputation as well as Konoha. Orochimaru bolstered this to an extent by giving Sasuke the curse mark. Everything about Sasuke's powers screams hand out. Naruto may have one freebie, and I do emphasize MAY HAVE, but every other power up and technique was gained through hard work and proving himself.