I'm currently stuck having to create individual pages for records in my app that I want to embed into a third party website. Ultimately this isn't sustainable as I will get to the point where the number of pages will degrade knacks performance. I can't use url links to individual records as potentially this could cause conflict in future if the database query tools change (i'd imagine) plus many host third party websites don't support such URL's (squarespace for example).
Being able to filter using the datasource on a generic page then having an embed code (that can be saved as it is with the current embed codes) that uses those filters would allow for a much slicker App build than is currently available.