No, man. It's era-appropriate and one of the few examples of Weasley awesomeness. It made me grin like a maniac when I read it. I think maybe having Rationalist!Harry chant the chorus was a bit off, but then, people do occasionally show odd bursts of confidence in front of strangers in humorous situations. It's a bit of a character-shift, but appropriate for the circumstance.
Edit: Months later, I just looked at the change, and it saddens me a fair bit. The replacement text feels like filler in comparison, and I'm afraid that when I convince people to try MOR they won't see him in the same awesome light I did so quickly. I feel like some of rationalist!Harry's mischievousness has been removed. I mean, I was almost pattern-matching him to a rationalist Bobobobo, but I enjoyed it.
Possibly a rubbish first post, but this highlight draws attention to something rather misleading: she was more exhausted? Reading that originally rang bells in my head at the same pitch as Hermione being memory-charmed. Then, I played with the idea that Harry taught her the True Patronus then obliviated her, for all of two seconds. Mind circles.
Only just figured out my inbox =] at the time I wrote that, I was new to fanfic, and had literally never realized the negative effect rape-as-plot-device could have on some people. Just looked at the chapter on hpmor and noticed Eliezer didn't put a trigger warning, which I find surprising.