GBZ, the PRO process was more appropiate for those kinder, gentler times when we had vaguely sufficient assest to deliver an airbridge to the Falklands and various bits of the Services to interesting and challenging exercises somewhere other than Salisbury Plain. If the cabin crew on the SA run are useless then you should certainly let the system know.
What we face today is a number of airbridges to more theatres than we are resourced to operate to, moving more pax and freight than we have for years (Berlin Airlift?), using a limited number of increasingly old (argueably obsolescent according to other, civil users) aircraft with critical limitations on er essential equipment. I am not sure there is a suitable from for registering a complaint about this, save the one you get to fill in every 4-5 years in a ballot box...