Answer

This is the standard claim, so here too I don’t see anything new.
I agree with every word of Rabbi Katan, and I have not read Sperber’s ruling. If they released her only because he refused to give a get, that is a very problematic ruling.
But from what I read in the press, they released her because she lacked information that the husband was violent and had even been in prison, already before the marriage. That is an entirely different situation, and if that is correct then all of Rabbi Katan’s claims go up in smoke. In fact, if that is indeed the situation, then Rabbi Katan is doing an ugly demagogic trick here.
The question why all the other panels did not do this is a good question, but since I know several cases in which I personally know information on the basis of which it would have been possible to permit it, and even fairly easily, and nevertheless the official panels did not do so, I am not especially impressed by that difficulty. The law of “do not be intimidated by any man” is not the strongest side of the rabbinical court judges, or judges in general.