I can't really think of a reason to not chose this option. Correct me if I'm wrong, but I can't imagine most end users are downloading the debug packages with regular frequency and it would save a decent amount of storage on our mirrors.
One thought I want to bring up is if we plan on continuing to offer the debug packages as part of the default Adélie experience or if we would require manual adjustments (or add a scripted option, etc.) for adding debugging packages as part of a user's apk experience.