Seems like a good combining of the programs for now. The new AA will see how revenue-based earnings go at UA and DL and then decide the following year what they're going to do on that (and other) fronts.
I think it's smart to keep this part of the integration as simple and undisruptive as possible. If they need to make changes to the combined program, they'll have a year of combined program information and data to makes those changes.