Two suggestions

Just stumbled across this, and it looks interesting.

I must admit, though, that I have great difficulty reading the code sections for the templates. The colors just don’t stand out enough against the black background. Could you, perhaps, experiment with some other color schemes to enhance readability?

Secondly, I notice you provide some forms of auto-subscription. Could you add the ability to auto-subscribe specific user roles (including s2Member user roles, of course!)?

Thanks!

https://wordpress.org/plugins/comment-mail/