I don't think dropping the CD is the issue - it's that it hasn't been replaced with anything 'iconic'.
From a design point of view the new icon seems to lack everything that Apple pioneered in icon design. That is, cohesion and physicality - features that imitators have often failed to capture even as they mimic the translucence and shine of the early aqua style.
For example, the inner ball has no sense of depth; the inner gradient (which would have felt like a refractive effect under the rules of aqua) bears no relation to the reflection on the outer surface. So there's no sense of tactility or material property. The outer ring has very little thickness or feeling of contour to it. So there's no sense of its connection to, or containment of the ball. Then the note itself has physical depth due to an edge highlight (that does not match the angle of the light hitting the ball!), but an internal gradient that contradicts its sense of surface. Furthermore, it takes on the shine of the ball, yet appears to have no relation to that surface. It's just a but unsophisticated.
This icon seems to be made purely with layer styles in Photoshop, whereas most of Apple's nice ones could well have a hint of Pixar in them. Maybe they've moved away from this relationship? Or maybe they just let the summer interns play with the app bundles too much this year?