Mining companies have safety management systems in place that are comparable to airlines. Companies that provide transport to them are regularly audited by outside specialists.
I doubt they will be waiting for an investigation and action to be taken. I would expect them to look into the incident themselves and have a solution in place well before anything comes out of CASA or the ATSB.
Procedural changes will likely be made and more resources allocated where needed, even if it means beefing up weather reporting and forecasting capability.
Price is always an important factor in FIFO contracts but a high level of safety is rightly demanded by the mining companies and the unions. The big names have deep pockets and would rather spend money on prevention instead of compensation. Being sued by the families of 100+ miners on $150 - 200 000 a year wouldn't be cheap.