As the heir, Naruto may gain the ability to manipulate time and space on a small scale, similar to some of the Six Paths' feats. This could give him an edge in battles, allowing him to dodge attacks or teleport short distances more effectively. He might also be able to communicate with the spirits of the previous Sage of Six Paths, getting valuable advice and knowledge.
He might gain a deeper understanding and control over the Six Paths powers. Maybe he can access different levels of chakra that were previously unknown. For example, he could have a more direct connection to the natural energy around him, allowing for more powerful and precise jutsu.