thank's for your feedback.
We will check it.
The atomic install is not so easy. Because you have dependencies to siteaccesses in cjw_newsletter_list. First i had a content package, but their i had problem with the language versions. So at the moment is the easiest and safest way to do it manually.
I think the install is quite easy.
But if you have a solution or have time to find one feel free publish it.
The new admin2 give us new possibilities. The current cjw_newsletter is developed since ez 4.0.1 and works with it. We have to check if we need new templates for admin2.