What functionality or generalisation are you particularly missing?

Update:
Except from trying to contact Shlomo and maybe Offer and ask if they are interested or even into that kind of further development, I don't see anything that could help you right now. It seems the module wasn't meant to do what you need.

Update 2:
Further searching CPAN for "Tree" and "Trie" finds a bunch of modules. Maybe there's a more suitable alternative for you there?

Cheers, Sören