Create template from drag and drop emails
As the drag and drop is still in beta. I wanted to submit an idea for a feature. I think that you should be able to create an email from the drag and drop builder and then be able to turn it into a template.
There are many smaller companies that still do email marketing without a developer on staff to create templates specific to their needs. Letting someone use the drag and drop and then make it a template for future use would be much simpler than using the design tools to create your template since that still manages to slide outside the realm of a designer's skills if they have never used hubspot.