Lets get to the real problem here, and it's not the aircraft or the pilots skill. It's training and procedures.
The common thread in many of these LAT accidents and near misses is the procedure of 'tagging' the first drop. Dropping a line of retardant around a co-ordinate is one thing, along a fire line or such, but trying to exactly tag that first drop to precisely join the lines is where the target fixation and errors really creep in, especially in aircraft that can be a struggle to fly precisely in these scenarios. Remember the old rule about riding a bike or skiing, where you look is where you go, fixate on the tag line, that's where the plane goes, and realize too late you are past the point of recovery and it's over.
It really seems that not enough focus in training is spent on how dangerous 'tagging' can be, and really considering what we've seen, maybe they need to approach subsequent drops in another way.
Need to stop using aircraft that aren’t purpose built!
Governments need to seriously look into other options for the long term like the De Havilland Canada DHC-515.
Fire trucks and ambulances are the same, a mix of purpose built and stock chassis with stuff attached. I know Victoria has had some woeful fire trucks over the years, some country CFA trucks could not even handle an incline in hilly terrain as they were built on cheap Isuzu chassis and the brakes would not hold the load on an incline.
As far as the CL range of aircraft, they would make a great addition for a select area of Australia, mainly around the east coast where adequate water areas are abundant. But as said before they would struggle for sortie times away from these areas.