V, I don't disagree with the appearance part, but there's still some precedent for what AA did which didn't involve AL-MO.
Prior to deregulation, there were few if any comparable asset transactions for the CAB to act on --- the transfer of AOA from AA to PA is probably the closest, and that was a subsidiary so there was no mixing of employees involved. It was also in the 1950's, and predated AL-MO.
Braniff's sale of its EA routes to MIA was done while the CAB was still around, but didn't involve any US employees, so there was no jurisdiction for them to rule.
In the previous asset purchases that AA engaged in ---- TW's LHR routes, and EA's LatAm routes, it was also a continuous operation. Nobody from TW or EA in the US got DOH. They didn't even get jobs.
In the transactions which involved PA for UA and DL, again, it was continuous operations until the handover. The few employees who came along from PA to DL were not taken in seniority order, and I don't recall any employees coming over to UA. The pilots at PA had to work with ALPA on dovetailing. Since everyone else was non-union, there was no need to arbitrate anything...
Overseas, the ground employees got their company seniority, but the FA's who came along with the EA transaction were and still are treated as second-class citizens to the APFA.