The RAF could make a start at rationalising the number of engineering trades.
Which is exactly what is happening with multi-skilling where certain trades will merge over time. The RAF took this to an illogical conclusion years ago with the super-techs who were trained, IIRC, in the electrical, weapons, propulsion, airframe and avionics disciplines. In reality, however, they never had the chance to achieve competency in more than, perhaps, 2 trades at most.