Just discovered 'Ditto' for the first time yesterday when a user came to me with funky conditional logic bugs - which ended up being the result of Ditto. While I understand where Ditto can be handy, it allows users to duplicate forms without issue in a breeze, and when it comes to safety documentation that isn't something we necessarily want.
Since discovering Ditto, it has allowed me to put two and two together for weird random data showing up in our documentation that couldn't be explained, it explains why some conditional logic was acting funny and so on.
Id like to see a feature where Ditto can be controlled and more dialed down. Whether that's a global setting that Ditto is disabled and locked on the device, or each form you can check 'Yes' or 'No' that Ditto is applicable.