KasiCair
I think it's a good luck for them to not having Ringo inside their inner circle since it gives the village elder and top leaders an impression that they didn't know how to detect loyalist or at least didn't care about others.. That's why they all decide to give Mei to them.. If not, I think the village will still be vigilant with them...
It would be nice if they met Zabuza-chibi. According to Zabuza he realizes that the Mizukage is someone else's puppet ... plus they label him as a demon by killing his entire class in that damn graduation shit they have in Kiri ... If Rei knew him as a child and taught him 1 or 2 classes, in order to boost his growth to a higher level, he could have an ally when it is necessary to leave kiri during the purge of "Keke genkai". Besides that, it would be nice if he could save Haku's mother (oc) and be able to add her to his future harem to get something from the "Yuki" lineage.