Well spotted. Just wanted to see if the FOs were awake! Now how do you factor in the relative loyalty of FOs, GMs and PMs? Another relevant item is the percentage of F seats that go unclaimed on each carrier. If that would decrease with reciprocity then the number of available upgrade seats is increased and the overall number of upgrades will increase also. The problem for the FO is that if you put the OAL's Elites ahead of them they never get a chance! Placing OAL's elites after DL's FO's does nothing but increase use of upgrade seats across the board. As Rssrsvp said, nobody would object to that.

Anyway, what makes anybody think that a CO plat would want to fly DL to get the upgrade. They would be in for a shock.