From a moral standpoint, it's definitely wrong to punish drivers for signal issues, and we should stop doing that. However, if drivers all started going at the

From a moral standpoint, it's definitely wrong to punish drivers for signal issues, and we should stop doing that. However, if drivers all started going at the normal speed and regularly tripping broken signals, it would absolutely destroy the system. When a train's emergency brake is tripped, it takes tens of minutes to reset it and get the train going again. If that was happening at every faulty signal on a daily basis, the system would grind to a halt. Really the only fix is dealing with the signals. But that's extremely difficult because they haven't been regularly maintained and are very old. Most of them use mechanical timing systems and other insane things that nobody has built parts for. There's no particular reason to believe that "changing them back" would go any better than the botched rollout of the initial change.