I mean, what's the alternative? It's almost certainly true that only a small fraction of the class cared about the "Other OS" functionality. Those that didn't suffered no damages when Sony removed the feature. Targeting the settlement proceeds to those people makes sense. One of the reasons you have those $2 coupon settlements is because you have overbroad classes where only a subset of members actually suffered harm, and the damages to the class are divvied up amongst class members who suffered no harm.
And $55 seems like a pretty good settlement for someone who used the Other OS functionality. Remember, that's a settlement value--the average loss of value of the PS3 to class members discounted by the probability of success at trial.
I understand the practical problems with providing the required proof, but this seems like a much more reasonable way of structuring a settlement than the potential alternatives.