While it would have been cool to see how the conductor's baton from Wind Waker would have been with motion on the Wii, it'd be just like conducting, and would probably bore me more than the harp. You'd still have to keep time probably, because that's all really what a conductor does: keep time, and in orchestra, tell them to get softer or louder, staccato or legato. Sorry, music words are kicking in. ^^
I'm neutral with the harp--while it was only played to keep time, and you "learned" songs, I wish that it had maybe button and motion control? Like, if it were a high note, you'd slide your arm/wrist/whatever up, and for a lower note, slide your arm/wrist/whatever down, so you're keeping time as you play notes. But this would have been possibly more difficult...
If there was something I could take out with how far I've gotten, well, um...I cant think of anything really. BUT THERE MUST BE SOMETHING DONE ABOUT THE SONG OF THE HERO. Ohgawd. It was sooo loonngggg.