One advantage of the palette over quick drop is you can see the context help for the VI you are looking at. It would be nice if the same was available in quick drop. I have run into this issue when using the sound and vibration toolkit a lot, where there are so many different FFT options, and I want to filter by the name "FFT" but then I can't see how each differs from another. So I end up going to the palette.
This sounded vaguely familiar, and then I realized there was an Idea Exchange post about it (that for some strange reason I hadn't kudoed yet!). Here's the link, I agree that this would be useful functionality.