While I understand what you're saying, I think you've misidentified the purpose of the RLA. The RLA isn't in place to ensure that transportation workers get a fair contract in a reasonable amount of time.

The purpose of the RLA is to prevent disruptions in the nation's transportation systems. At that purpose, it is far from toothless. The RLA is quite effective at preventing strikes and lockouts. The protracted negotiation process is exactly what the RLA was intended to produce.