I'd say that it fits because he had just killed Torin. From a writing/mood point of view, having him do a little dance right after that probably would not have fit very well. From in-series, well, after killing Torin I can't imagine he was in a dancing mood.Yeah, that was probably the most underwhelming henshin of the year. As if the music/energy produced by his spirit is nothing compared to the Earth's melody and his body doesn't even need to get it out violently by dancing. Nope just lightly taping your foot and one finger is enough. Underwhelming.
But to be honest, I do agree with you because I think he looked, dunno, bored? It was like he was just waiting for an elevator. I don't know if that was intentional or it was the actor, but yea, other than being a little amused at how simplistic it was, I didn't like it either.