[Spooky]

No need to break the Parent/Child relation, you can go back and edit the original loft sketches to update the ribs by adding more/less holes or cutouts, or cut-up each rib separately or together in the wing assembly to get what you want. The lofted wing/ribs stays a separate part, yet still retains relations with each rib... cutting up the "child part"(rib) doesn't affect the "parent" (lofted wing). If you look closely at the last pic, your actually saving each rib as a separate solid body to it's own part file.

If you need anything, let me know, I'd be happy to help.