I think Yukio got over it. There's really be no point of finishing this talk otherwise - and like you said it'd be really shitty to have this going throughout the storyline. Fight some "real' demons.

I want to see some cross-overs between True Cross High School and the Exorcist Cram school. Too bad it doesn't seem like too many students do both.

The other thing that pleased me was that Rin's ears are sealed until he releases his powers. Pointy ears only look good under certain conditions. Girls, preferably.