Feature Request: "Invite a Friend" email templates based on relationship being requested

Issue Summary

I'd like to be able configure email templates per relationship request type, for use when users use the 'Invite a friend' to send emails to new users of the site.

If I'm an invitee and I'm inviting an existing site user, it sends off a lovely customised relationship request email like:

Dear @requestee_name,

@requester_name wants to be your @relationship_name.

But if I'm sending off invites to new users all they get is the standard invite email, even if the invite also comes with a relationship request.

New users get no context as to why they are being invited to the site nor any explanation as to what this 'relationship' they are confirming actually is.

Does this sound like a reasonable feature request?