+1
As a part of greatly improved box set handling, disc labelling would be essential, along with support of nesting of covers. Scenario: the gazillions of “original album box sets” on the market. We need one overarching cover and box name (probably that from TiVo) and at the same time each constituent album cover and name within that (perhaps also from TiVo but potentially also editable).
An album in such a box set should be connected to the same album on a single disc, as well as being in the box set.