What would it take for you to separate out the CD to its own, separate feed?
While I agree with you that CD mixed in with airborne freqs doesn't make a very tasty feed cocktail, there is value in having a CD feed. There are always a few pilots, most times IFR students, coming to this group looking for CD feeds to practice their clearance copying skills. And that's just the vocal ones. I bet there are many non-registered visitors seeking this as well.
I am not exactly sure what it takes to host a second feed (second scanner, second sound card, yes, but not sure about the antenna options - can one line be split amongst two feeds?) but since there are not that many CD freqs here, I would be willing to donate something to the cause as a service to those up-and-coming IFR students.
Think about this idea.