I love your Anti-Theft feature and hopefully you can have more added security, since domain hijacking is became more and more common in these days.
My suggestion:
1. You add feature to log login and the customer can see it under their account, so if there is any suspicious activity, the customer will know it.
2. You add feature to notify customer by email (email send right away, with no delay) for every major update on their account, like login attempt (success or failed), change account information, change password, change domain contacts, and change domain nameserver.