The exisiting profile substutions option is a great one, but we still have to do all the editing work twice, because it doesn't work with a recurring email delivery. We now save the original email as a template, but sometimes personalisation fields get broken when using a template for test purposes in a single send delivery.
What we need is an optional 'confirm' button in a recurring email, so you can prepare a message, test it and afterwards release the 'confirm' button, so the recurring email will be delivered without human interaction after proofing.
The problem in a recurring email is that a email message will be sent right away, although the profil substitution option is displayed.
Profile substitutions is displayed