Blueprint Builder

We've had a few customers ask for the ability to create their own page blueprints, including the ability to add custom variables to the form / wizard that appears when creating certain blueprints (e.g. decisions).

If you are going to vote for or comment on this issue, we'd love to hear about your specific use case – why you'd find this useful? What kinds of custom variables would you add? What types of blueprints would you create?