To be clear, I meant no criticism of the Supreme Court of Canada for having that high bar for hearing cases. That is, obviously, necessary in terms of managing the work of the Supreme Court of Canada, and the integrity of the system.
However, once you say that, you are actually saying that the individual judge has no appeal from this internal process that is being run by the Canadian Judicial Council, so there might, in fact, be a miscarriage of justice there that isn't of national significance or constitutional significance but might still be a real miscarriage of justice.
I think that is why The Advocates' Society was suggesting that an effective appeal would be to the court of appeal.