Unfortunately it would not have helped. The crew involved did have CRM training, the management pilots also had CRM training. At no point was CRM applied by anyone.
In addition, when Transport Canada mandates CRM training, the course must be approved by them and then followed verbatim with no deviations. This invariably leads to wooden, death-by-powerpoint, excessively boring courses which are difficult to stay awake for. The same course is then repeated every year without updates of any sort.
Pretend training is not the solution this industry needs. Management pilots doing their jobs, setting a rising standard, and putting massive amounts of effort into providing good, comprehensive training is what it needs most of all.