I would love it if when saving your deck there was a "Includes Primer" check box similar to the "work in progress" function. This would be great for searching through decks, and you could include a text box which allowed you to either say that the primer is the deck description, or provide a link to google docs (or another specifically whitelisted site). This would be awesome because it would allow people to more quickly find high quality decks they know will include reasoning for the decisions that were made for the decks.