Eh. If you know exactly what your target is, I don't really see what the issue is.
I think it's better to just have all the music in one big package on the front page. It shaves off about 10 items from the DLC list, which honestly would scare newer players off sometimes.
Well except that "Hymns of Revelation" isn't in "Crusader Kings II: Ultimate Music Pack Collection" so not all the music is in "one big package" unfortunately. And sure if you know exactly what your target is most shopping decisions become easy, but normally companies strive to make it easier to spend money, not harder ...