Blueprint Customization based on Project Request

Currently we have our request form set to apply one of six blueprints based on a custom field we have for Deliverable (email, web/print design, etc.). 

For example: Sally completes a request form and selects "email" as the Deliverable, creating a project from the email blueprint. However, after discussing with Sally, we discover that there are more components to the project (or maybe she selected the wrong Deliverable), so the tasks from the blueprint no longer match with the scope of the project. 

It would be great to have one master blueprint and apply different tasks based on Deliverable, which PMs could edit to automatically populate a specific set of tasks. Currently, even with using blueprints, there is a lot of manual entry and editing of tasks. Thanks