The list of files of an ISO is useful -- to study the list of packages included in this ISO before deciding to download it. A good example: ftp://ftp.altlinux.org/pub/distributions/ALTLinux/p7/images/simply/altlinux-7.0.0-simply-i586-install-dvd5.iso.txt A not so good example: ftp://ftp.altlinux.org/pub/distributions/ALTLinux/p7/images/simply/altlinux-7.0.1-simply-i586-live-dvd5.iso.txt In the latter case of the LiveCD, it's not good that we can't read the actual list of the packages used/installed in the live system (because the ISO contains the whole image of the live system as an image).
Rather a policy proposal than a technical feature request.