Blue skying here but I have taken over for an admin who was here since near our relationship with Zendesk began, and there are a few things they have done that I question, yet I know there is a great explanation of what they have done.
It would be great in the admin section, to have an option to leave notes of changes (thinking triggers, automations, etc) so the next admin, or even instances with multiple admins, know what was done and why - even a reference ticket number that can explain the changes/updates.