That is already possible. Options > Appearance, [x] Display files in each root collection node

If I create a collection called "Albums" and choose to only show the "Album" node in that collection, it should be possible to have the collection show the contents of that node when I click the collection, without first having to expand the collection and click on the single node below.

I.e, make the Media Tree move user friendly, right now it's kind of hopeless having to expand and dig around trying to find a specific node.