There are many fields on the backend of EasyBlog, which are specific to blog authors,
e.g. Blog permalink, Blog title. I understand that an author can change the values of these fields using the EasyBlog profile edit menu item.
I suggest making these fields available at registration time. The following is a list of some suggested options to achieve this.
1. Having an EasyBlog menu item for Registration, which would include these additional fields,
2. Providing a way to map these fields to Joomla custom fields, or
3. Providing a way to map these fields to Community Builder custom fields
By the way, this ticket is related to the following ticket.
https://stackideas.com/forums/adding-author-fields-to-registration-form