No pilot who has gone thru a merger hasn't complained FOR THE REST OF HIS LIFE about lost seniority. UAL-Capitol merger was a common complaint from the airline captains of my youth. I now guys who did a decade or more of "sitting' sideways", something nobody does today. Now, they just sit in regionals or on furlough. Speaking of complaining, don't get an old engineer started over the FEIA strike of '62 when ALPA broke their union. Even the FEs who became captains complained about it.
GF