I used to be a very frequent user of Gatwick Express in the mid 2000s. I loved it because I could sit in the rear coach inbound, or the front back from the Victoria, and generally never see another passenger. I could see that this was a poor use of scarce resource, but on the rare occasions that anyone else turned up in the carriage, I understood the value of them being able to load vast suitcases into an uncrowded environment.
Surely this is all that Gatwick Express needs to be: pretty much the guarantee of a seat for exhausted and disorientated air passengers, and decent space for luggage. This can be delivered by a combination of using the right stock slotted into the timetable in the right way, and under no circumstances should it justify anyone getting overcharged for a non existent premium service.
I know that none of this is an issue at the moment while there are no air passengers, but I don't understand why it's proving so difficult to organise in normal operations any more?