Turbine D, stand up and take a bow.
If faulty design of pitot probes are "at fault" here perhaps the radar manufacturers are also at fault for not building a radar that can detect the ice crystals by running at one of the H2O molecule's resonances. There may be conflicting frequency allocations involved. But that can be dealt with for safety, I suspect.
Regarding the probe, it appears nobody has been able to reproduce this in the lab. They cannot develop the conditions postulated to create the problem because they are so outlandish. So should they be blamed for that? Should retribution be extracted from them for that?
Please God, can we use this accident as a way to improve system safety and not enrich trial lawyers to extract "retribution?" Kick a butt is there is one clear butt to kick. Otherwise move to the real problem, making it safer.