A feature request - probably not easy to implement or even sensible to ask, but here goes.
I use Facebook friend lists a lot, especially to manage permissions. However, it seems that Facebook makes it as hard as possible to manage the lists (on purpose, I suppose). I mean simple operations such as: move these people from this list "2015 Holiday friends" to "Colleagues past and present". I would welcome a way to manage friend lists, even as simple as the Group Manager in Miranda.