It tells us:
1. Naruto trained to master his friends' balls more than his Spiral Chakra Balls
2. The future of Rikudou Sennin's method of attaining peace through connecting with charka is transforming into naked men
Who knows? It may work again. People have fallen to that Sexy Jutsu (Hiruzen, Iruka, Jiraiya) more than once. Naruto can just do it again, who cares if Kaguya's an omnipotent being? It's her weakness.
Ok, but seriously this chapter was ridiculous. It's become evident that Kishimoto just wants to end this manga.
And it proved that anyone with Sexy Jutsu>Kaguya. So Konohamaru>Kaguya.
That's true that some of us stuck around to for goofiness of Naruto but that was a long time ago and a lot of us are older and expect more. I'm not saying the dash of humor thrown in ruined Naruto but it was definitely a big reminder that its not all srs bznz.