Allow for more input fields in Templates -> Template settings.

The form should contain all fields within Newsletter and Triggered campaigns, excluding the "Schedule" and "Active" buttons on the respective campaigns. This would assist in maintaining uniformity, improving campaign creation speed and possibly increasing the success of any handover.

Allow for edits on a template to be mapped to existing campaigns.
From keeping workflows and campaigns chronologically or factually updated, to rapidly deploying changes to campaigns, edits to a template should offer the option apply edits to campaigns. The user should be prompted to select which fields to copy / merge and which campaigns they wish to apply the changes to.