Hello Tim,
Thank you for contacting us.
Please find our response to your queries below
I would like to create a list per category but the only options when creating a list is adding a title and description
— A new list can be created with the help of the following steps
1. Navigate to Email Subscribers –> Audience.
2. Click on the Manage List button.
3. On the Manage List page, click on Add New button.
4. Add list name and list description(optional).
5. Click on the Save List button.
A new list will be added after submitting the form. You can refer to this documentation for more information.
How can I dictate what lists receive particular blog updates if not through assigning categories to lists?
— Email Subscribers plugin allows you to create post notification campaigns to notify subscribers about new posts on your site. In a post notification campaign, you can decide for which post categories emails should be sent. Also, you can configure to which list of subscribers emails should be sent. e.g. You can create a post notification campaign that will send emails to all subscribers from list Techie when a post in the category Gadgets is published on the site.
Hope this helps you. Let us know if you have any further queries.
Thank you.