I checked to be sure there is an investigation into the GC,
NHTSA Action Number: DP09005 FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP.
So they aren't ignoring the problem, but the cars are no longer being produced. Rear end collisions causing fire aren't unusual in any car, it takes some analysis to determine if the GC is a statistical outlier or not.
With the Toyota situation a specific problem was identified with cars currently being produced, they are obligated to remedy the situation or cease production.