The press release sounds more flexible than the actual guidelines:

Press release (emphasis mine): "all apps that allow for account creation must also allow users to _initiate_ deletion of their account from within the app."

Guidelines: "If your app supports account creation, you must also offer account deletion within the app."

Has anyone seen any clarification on what options might be acceptable? e.g. I'm wondering about something simple, like opening an email composer with the app support email address and a pre-filled message body requesting account deletion which would be performed async.