I think we lose CO , not gain UA
My 2 cents.
The new airline is United , not CO.
AX has never had reed carpet access and to my recollect never had transfers to mileage plus.
Will the OnePass program continue to exist?
Will President's Club Name be retained?
Amex has been heavily centric on Skyteam and particularly Delta.
Not to say that there are not other tie- ins, there are. Admirial Club, AeroPlan, Mexicana miles.
But It is a skyteam focused orientation.
So I predict bye bye CO