I'm not a GM either, but I would say that the GM's seem to be wanting us to have characters that are actually Chuunin level. And by that I mean realistic Chuunin. Not plot armor chuunin like Konoha 11.
In the base of this world, Genin have barely fought any other shinobi except in rare cases. And if they do, they usually die. New Chuunin are shinobi that are just beginning to take missions that bring them into combat with other shinobi. So the most powerful a character can be in this regard is borderline Jounin. The number of jutsu and skill in this character seem to indicate Naruto levels of power as a Chuunin.
That said, I adore the format you have going. It looks gorgeous. The character also seems really interesting as well in terms of story/personality. Though I'm not sure it is entirely realistic for a Jinchuuriki to be sent away from the village...more likely they would be imprisoned or have the beast extracted to put in someone more loyal.
Not a GM so this all up to Halvtand and Mad Hatter. I would suggest though looking at the two approved characters and trying to be more equal level with their strength.