See below the official response about the " enhanced " claim :
Thank you for your email.
*
Unfortunately, the club do not have any control over how many trains southern rail use on match days, however theyhave advised us that they will be running an enhanced match day service for our fans...
Doh! Silly me didn't appreciate its a relative statement. And not confirmation of an adequate service to get a large number of people to and away from a packed football stadium.
Am I missing something here? The Trainline app suggests that if coming from Eastbourne it's two trains an hour and the same for the return. Not very enhanced at all! :(