Well i dont think its much good having IFR aircraft just for the sake of it, wheres the nav aids in Antarctica?
The US navy certainly got the message that two pilot IFR aircraft are as likely to crash down there as singles if you make bad calls or are just unlucky.
The kiwi airforce certainly wrecked their fair share from poor piloting as well and the americans had the high profile crash of a 212 a few years ago.
The Astar is a great aircraft for operations in Antarctica and this accident may just prove to be pilot error which as we all know can happen to any aircraft anywhere.
As for flight following, there are plenty of ways to track aircraft automatically. I think its also cumpulsory on the American operations at McMurdo to use satellite tracking.
Either way its a real shame but thats the nature of operations down there.