The subject of loss of control has been done to death. There has been countless conferences and articles in the aviation media and it all boils down to lack of basic UA recovery training in simulators. Most operators are content to pay lip service to training pilots on how to recover from UA's and leave pilots to Google the subject.
Ab initio students should be learning this stuff during PPL training but it rarely happens perhaps due to lack of suitable light aircraft that are certified for aerobatics. Lack of experienced competent flying instructors doesn't help, either.
It takes only 15 minutes at the most, of simulator time to teach pilots how to recover from loss of control (unusual attitude recovery). But while the subject is not going to be addressed seriously in the simulator expect the occasional prang as we have seen in 737's over the past ten years