Carl,
Our MEC both collectively and to a man can not under ALPA's Constitution advocate leaving ALPA. ALPA has a number of remedies and would likely throw the MEC into receivership ... nothing of that sort is going to happen ... so lets go back to the real World.
Just as ACL65 suggested, people need to continue to bring concerns with representational exclusion to their Reps. There is a perception that Delta pilots do not care about this issue.