1) In the composer block that lists previous posts: Need a checkbox to “skip current post.” That way, if you create the newsletter after the post is published, it isn’t included in the “Previous Posts” section of the newsletter. If a newsletter is pre-scheduled, that block should automatically update with most recent posts so it displays the most recent ones.
2) In the composer block that places a full post in the newsletter: Need a way to access posts that are scheduled but not yet published, or published as drafts. Otherwise there is no way to automate and pre-schedule the creation of a newsletter before the post it contains is published.
My blog is populated with content three or four months in advance. I’d love to be able to create a newsletter for each blog post in advance, and schedule those to launch just after the post. As-is, the scheduling function isn’t of much use as the newsletter plugin won’t access unpublished content.
3) Separate welcome/confirmation emails and pages for each list. If, for example, you have a music site, you want a different set of messages to go to the death metal fans than the ones that the polka fans receive. “You have successfully subscribed” is functional, but generic.