It would be nice if you can use more than one entity in a snippet.
If I have a data view with a listview inside, I can only give this listview item in the Snippet, and not the dataview content.
I agree with that. When you have nested data structures it should be possible to use all the entities of the parents. It's also a bit confusing now, because sometimes you get the parent entity as well (in for example a microflow) but not always.
And I think it shouldn't be that hard, because for visibility and editability you can mostly access the parents entity.