Simmilar bug: https://bugzilla.wikimedia.org/show_bug.cgi?id=9361
There was a german discussion going on: http://de.wikipedia.org/wiki/Wikipedia:Verbesserungsvorschl%C3%A4ge#Verbesserung_der_Suchoptionen_auf_Spezial:Gesch.C3.BCtzte_Seiten
Aim is to see a list of the pages/articles that are protected for the longest time. The Solution for me seems to be interesting for all users, so a skin solution is not the right thing.
The Problem is, that at the moment the protection dates are not in the APi but in the log.
I would appretiate these filter and sorting options.