Getting rid of the 717s was a business decision.
Your MEC screwed you guys with the first integration agreement.
That's where the lawsuit should be directed.
It's already been filed, and it's a loser lawsuit.
1. The MEC members acted within the ALPA policy manuals (both local and National). They had every right to turn it down at the MEC level. Whether they should have or not is debatable after the fact, and we've beaten that horse to death, but legally-speaking, you can't win a lawsuit if the people acted within their legal rights in effect at the time.
2. You can't sue ALPA National with any success, because the National advisors present specifically suggested that it should have been sent to the pilot group for vote, but knew the MEC had the right not to do so. This is all part of the record, available to any ALPA member in good standing who wants the meeting minutes. Since ALPA National suggested that it go to vote and they followed ALPA policy, they pretty much are insulated from any lawsuit.
3. Our local MEC doesn't have a ton of cash to begin with after the money spent on the SIA. Since you can't sue ALPA National successfully because of (2) above, you only have a small pot of money to go around if you somehow got a favorable ruling suing the local AAI ALPA. If you have 100 people suing, each has probably already put $4-5k into legal fees and it only grows every day. At some point they will spend more than they will make.
4. Even if you successfully sue the individual MEC members (extremely difficult because of (1) above), even if you got an award for a large monetary amount, they'd simply file bankruptcy on it and move on with their lives and you'd never see a dime. I don't think any of them have any large pool of assets to seize above their protected property under bankruptcy law.
For those reasons, the people suing ALPA are simply barking up a tree that's not going to bear any fruit. It may make them feel better, but the only people who win are the lawyers (as usual).