no the kaiten is a bloodline technique they arent afraid of kaiten getting out they are afraid of 64 hands and byakugan getting out like kamui said with curse seal sasuke wins without neji wins
about the chuunin level thing being on chuunin level and being a chuunin are different things naruto/sasuke/gaara/neji are all on chuunin level but are not chuunin
is a chuunin and probably would still be beat up by one of the above chuunin level means you have the potential but you just arent complete yet