It's now great to have the total lenght that we didn't have in classic but as it was before NGS, it was quite hand to see the medium length.
On bottom of each medium, we would have the CD icon, the selected Disc ID and the Disc ID length.

It would add two information, the selected Disc ID, and more importantly, each CD's length.
Or only each medium length (which is the most important anyway) on no TOC releases.