I just can’t help but be bothered that the uzumaki village is not in the seas surrounded by raging whirlpools. Or is this not Uzushiogakure? Also, I doubt a clan head will pay attention to the words of a 9-10 yr old genin. By off chance he does, I doubt he’ll strategize and decide the future of his clan’s fate off the words of a kid. If he does, maybe it’s better off that the Usumaki clan is killed off with that kind of leadership to begin with. As readers and fans of Naruto, we know the fate of the uzumaki so we aren’t too skeptical but as a character in the story who has no knowledge of the future he should take the words of a foreign genin with a grain of salt.
Are you sure this wont end up with a harem tag? Tsunade has a thing for him. Right now he might get a few Uzumaki wives. After he tells about the birdcage seal he might get a Hyuga wife or two. If he prevents the Uchiha massacre they might start to like him too. He did beat the Uchiha Golden Boy of this generation, the girls can't just ignore him and call him weak.
Just something else you might want to do is leek the whole Zabuza & Haku story line, how he knows about the secret graduation ceremony or that the land of water plans to wipe the Yuki clan out. I think the Mist village among others would find that interesting news. Might make a little trouble for the Land of water and make a few less ninjas want to sign up knowing that 50% die at graduation.