I honestly feel for the victims. They went through a horrible experience. Then a lawyer took them for a ride. PLCAA is very specific and not likely to be easily overturned. They just put a significant amount of money in their lawyer's pocket for a case with near zero chance of winning.
There was another case not long ago were parents also tried cashing in by suing a firearm manufacturer. They not only lost, but had for pay for their lawyer cost as well as the firearm manufacturer's lawyer costs. The Phillips were represented by the Brady Center to Prevent Gun Violence in DC and Arnold & Porter in Denver. Unshocking that the Brady Center would give bad legal advice to a grieving family. Sportsman’s Guide asked for > $70,000. Lucky Gunner petitioned for >$150,000 to be awarded jointly against the Phillips and their lawyers. BTP Arms asked for $24,000 for attorney fees and $33,000 in relief.
The lawyers want to crack the PLCAA because it could be a huge amount of cash in their pocket if they could sue manufacturers for the end use of their product. Just like if you could sue Ford for every drunk driver's action.