It's really frustrating to not be able to set a user-submitted page to NOT have a sidebar on it when you've developed a whole custom theme that doesn't make use of the built-in sidebar.
When users submit an event on our website, the default is for the sidebar to be on, which messes up all the fancy customization we've done for the design. The only solution at this point is to log in as an admin and turn it OFF after the fact (which means the user sees it with the sidebar and potentially can SHARE it with the sidebar).
It would be FANTASTIC to have an option to require that signers submit their zipcode, instead of their whole address. I think people are hesitant to put their address down with a petition, and really, I only need the zipcode for regional targeting.
It would be helpful to have the option of setting a different email address in the 'from' field and the 'reply to' field for blast emails. This would allow senders to send emails that look like they come from their personal accounts, but have some level of control over where the responses go to (especially helpful for bounce-backs).
I would LOVE an auto-save feature! I can't count the number of times I've forgotten to save my work and lost it all when I move to another page.