I know they state they are there to investigate possible MoJs, but I see them more as a filter. JBs case aside, there are any number of guilty people in prisons who would love to be out. If it became just a matter of persuading a panel of Mondeo men and women that there may be something a little iffy about their conviction the flood gates would open and the justice system would not only grind to a halt, it would go into reverse. So there has to be some system by which those who may genuinely be the victims of a MoJ can have their cases referred, but those who are just chancers are filtered out. That requires some expertise. I don't know what qualifications you expect the panel to have but they don't seem to be exactly thick. You may argue that they have not displayed that expertise, but as I said, unless you know why they came to a particular decision you cannot really criticise it.
The CCRC is very far from perfect IMO, but should be improved, not disbanded.