I really looked forward to this episode since we were introduced to the new kids, as Enkos design was really interesting.
I wasnt disapointed: she hides a Monster(-Bear?) underneath her Gloves that rampages when she feels lonely. Reminds me of Jugo and his powerset.
The overall message of this Episode was alright. "You dont have to be scared when there is no reason to". Nothing special really.
Ibiki fits into the theme of fear and the genin are specialized in restraining their targets, making Interrogation easier. So making him a Genin Instructor makes more sense then making Hanabi one, so its fine.
He is a Tokubetsu Jounin, they are usually weak in other areas than the one they specialize in.
His forte are mental&physical torture and interrogation/intelligence gathering, seemingly some genjutsu skills are part of that.