CRAP56 Your view of drills and checklists reflects a common mistake that there will be an SOP for all situations. The BAe146/Avro RJ QRH has been revised several times during the last 20 years to incorporate lessons learned.
The Avro RJ control system is a very well designed and robust system, but even for an apparently simple system, it is impossible to provide a drill for every method of failure, particularly where human interaction is required. The crew has to first detect the failure and take initial action; fortunately, in the Avro the instinctive control break-out usually suffices. However, crew analysis is required to determine what control remains (which aileron, trim, roll spoiler is active if at all), what options are available, and what consequences may ensue (e.g. control regained below freezing level). Little of this activity can be captured in a QRH, thus the need for intelligent crew, exercising good airmanship to ensure continued safe flight. We should celebrate successes as shown by this incident and, as humans, learn lessons as necessary.
Yes, the QRH is being rewritten again to keep pace with modern training, crew experience levels, and human abilities and attitudes.
No, I have not detected any change in human error, or the human ability to criticise without first seeking the facts.