Why is the court using the proper classification of Express as precedent in other cases?
They haven't formed an opinion whether the classification was proper or not, they merely stated, pertaining to existing statute Federal Express was formed as an airline and under that statute is defined as an airline.
They took the time to go into box counts that were air packages and those that didn't enter the air system. In reading an opinion that had nothing to do with the determination of Fedex's classification a lawyer would look at their reasoning as to why they denied UPS pleading, first and formost their founding and how FedEx is different beyond that. The court reviewed the box count and hinted it as a ground they may consider should it come before them.
Try reading what is implied or where there may be reservations in an opinion.
It's a case seeking a plaintiff. Learn something about how cases receive apellant review.
Why do you think I almost plead with hubworkers or couriers to force a response from the company? You have to force their hand or get it in a courtroom by any means and the means are few.