That's probably the reason right there.

If ALPA can't get compliance on language they have already negotiated, and paid for..... then it would not be a wise expenditure of resources to negotiate new language that would also be difficult to enforce. ALPA's first job is to get contract compliance and enforcement, not really to protect the pilots from themselves.

ALPA needs to put flight ops on notice that contract enforcement is key. ALPA can actually achieve both enforcement and a new LOA with existing leverage. Just tie the LOA to current "ambiguities" with in our current contract. We get both a new LOA and CBA interpretations at the same time. Call it a joint LOA....The leverage is there if any reps are watching this forum.