So are you suggesting adding Subresource Integrity (SRI) for launch hosted files? https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity I'm not sure if there are any plans to add this functionality, but it is interesting.
Sounds like a perfect use case for segments, which allow you to create a filter on a report. Here's a great playlist that teaches how to use segments in analysis workspace. https://www.youtube.com/watch?v=QlUCdQDnni4&list=PL2tCx83mn7GuAoZDFNf63-aMAjuYwC_AC