I know that this was addressed several years ago as a low priority task, but having the library be able to sort numbers in a title by more than the first digit would be nice.
Ex:
Current Form:
Title Vol. 1
Title Vol. 10
Title Vol. 11
Title Vol. 12
...
Title Vol. 2
Title Vol. 20
...
This is very useful when wanting to play through an series in the right order without having to change the sorting order of a playlist or library from alphabetical to track no.
Also, this is just a plain level of sophistication in sorting which would make the player much more comfortable to use.