I think what I'm about to suggest will enrage a lot of people, but I should:
Having been on the spot of this accident and knowing the amount of traffic and average experience of people who attempt to summit on a given weekend day, perhaps there should be more drastic measures to prevent these text-book, repeat accidents. (risking the lives of rescuers and tax money)
In fact, I'll go so far to suggest fixing a line from the schrund to the top of the Pearly Gates. The climbing community (guiding companies, etc) could help maintain the lines and novices can just clip in and avoid incidents where they not only harm themselves but others.
So what, guides on MtRanier do similar things all the time.
I know people will think that this will make the place a zoo. But come on it already is. And if you don't wanna be part of it, just do one of the easy variations on the left face off the Hogsback. (avoid the whole zoojam).