Action to read value from Settings API

This is certainly possible, but we've not implemented it yet for a reason. Having access to the settings can potentially be a security risk as ECA would then also have access to the hash which would allow for dangerous things if that got exposed.

If access is a concern, what if we require the respective settings keys to be added to a whitelist first?
Like for instance, the action will only read $settings['some_custom_setting'] if the value $settings['eca_misc']['settings_read_whitelist'] = ['some_custom_setting']; is set.