Originally Posted by glide approach
From the critics, I am genuinely interested in hearing whether anything else could have been done differently.
You ask a good question. If the forecasting is so bad that these aircraft are forced to do illegal landings then the approach requirements should be improved eg carry an alternate with a autoland-capable ILS (in the Adelaide/Mildura case, Melbourne is just "down the road"), or upgrade the ILS at the destination. In the Jaipur case, I'm not familiar with the exact situation there, but similar; at the very least, have crews and aircraft trained and practiced in emergency autolands onto Cat 1 ILS runways.