The possibility to customize the emails sent from the Bricks form.
If emails could be drafted to be sent for specified dates this could offer a cheap newsletter option for many website subscribers!
I have been looking for a self-hosted email solution with wordpress for some time and at the moment the best option that I have found is the Tribulant Newsletter plugin.
If this can be implemented within bricks as a lightweight solution using Amazon SES (using a SMTP plugin) this feature could be a real winning feature!
Check out this email builder for Elementor. Maybe if you copy their capabilities and features the email part could be a big value on its own.