I would recommend that you rewrite the book. Noah shouldn't reincarnate but his legacy should be passed to the body to heal the soul and body of the mc instead of taking over. the est of the story is very interesting but you lost out on a lot of emotional content there. or if not legacy at least all the memories.

exactly the same as assassin becomes strongest swordsman and and greatest assassin becomes aristocrat but I suppose he can't call it the average assassin gets reincarnated