No idea how feasible this would be with how the data is stored, but it would be great if in addition to origin and url specific data, there could be a third, almost in between level of path,
i.e. for the path of
https://example.com/fooYou'd get the aggregate for:
https://example.com/foo https://example.com/foo/bar https://example.com/foo/bar/bazand so on.
Many sites are structured with different types of content on different paths, an example might be a Shopify site that has product and categories on /collections/, informational content on /blog and so on.
I think that would help developers and site owners understand how different types of URLs on their site are performing, and almost allow a 'group' view à la search console
Even bigger bonus points if you could specify wildcards, so something like https:///collections/*/products/
Could give you data on how your product details pages were performing on a Shopify site for example.