Well, don't work for either airline, but just to throw my $0.02 in; that is why I just still believe the easiest way to do any integration is simply, DOH (or rather LOS, length of service, doh adjusted for furlough, leaves, etc.) and just protect equip. positions/bases, pre-merger progression with 'fences'
Not permanent fences, and after the fences come down, enough movement has happened (retirements, etc), and everybody just ends up with whatever their 'seniority' holds, Capt. F/O, Int'l, widebody, etc.
If it was done that way with DL/NWA, entire SLI could be done in a few days, only thing that would take some debate is deciding on the 'fences' (c&s), conditions & restrictions, then DONE.
Still seems like the easiest way to do things, and probably why EVERY other union in this country (and the World for that matter), do it that way. Except pilots in this country???
Again, for what its worth.
PD