Here's how you can turn off the 'flow' button in doc libraries/lists within SharePoint sites using Powershell. Whether they are shown/hidden is governed by a property that can be set on the SPWeb. You could obviously adapt this script to target specific sites or leave as is and target the root site and all sub sites within a specific Site collection.
If this feature does become available, please provide a way via the API for us to be able to set the default Compliance Label on the folder programatically
Now that the 'Dispositions' dashboard has been created (which is great by the way) that has views for 1) content that has expired that needs to be actioned & 2) a report of past dispositions, could we address Will's requirement here with a 3rd view that shows 'Upcoming dispositions' which would display the date the content is due to expire, again with some of the same filters that are available on the other views you have created.