This may be a bit fanciful but it'd be great to add 'generate email alert' or something similar via the order rules module.
We've already got mailgun plugged in to send the usual alerts etc so could we not have an extra action that would generate an email based on an email template (the same way you can with orders etc)? We'd set the action as 'generate email' and the parameter would be the name of the template.
Just a thought.
