Edit all hyperlinks panel - like the Edit all Text Styles panel
This would allow quick changes to a host of links - especially useful when reusing layouts but changing images, content and links. A panel would allow the changes to links, and campaigns. It could have several columns which could be used to construct the links. Here, with examples:
(would add &utm_source=xxxx to the URL)
(would add &utm_medium=yyyy)
(would add &utm_campaign=zzzz)
Many of the details in these columns would be identical throughout a new piece and being able to edit them all in one screen would be both a time-saver and a way to avoid errors and ensure consistency.