Enhancement: Can Subscribe by Email upload be updated to add names?

The subscribe by email plugin is great!

However, I have more information on my database that is useful when I import subscribers via .csv file. I tried to upload a database with first name, last name, email--but it only took the email address and now I can't tell who is who by email only bc the upload didn't take the name information with it. I think in the next update that would be a helpful enhancement!