I have to agree that more information in the title list grid would be a very welcome addition.
I like the drop-down concept in place to see more detail, BUT when a disk has a ton of titles to weed through, it quickly becomes cumbersome to find the one you want.
I just extracted the movie Source Code, and it has 51 titles! Most are the same approximate size! I was forced to go online and search for someone else who knew which title was the one to extract.
While you may be hesitant to do all of the coding to boil the list down to "Main Feature", "Previews", etc., perhaps just add a bit more info the the summary for each title in the list?
I mocked this up as a crude example:

- MakeMKV List Concept.jpg (35.59 KiB) Viewed 8902 times
This may be better done as columns, but you get the idea - total number of subs, primary audio tracks.
This would make things much easier!
Thank you for your work on this app!