I have got the first train back from Falmer to Lewes on the last two midweek games and I am shocked at how few people the "attendants" allow to get on these trains. There is loads of space for more people to get on the first train.
Quite often to me the train seems less crowded than it would be for a normal London morning commute (i.e there is loads of standing space). The next train is not normally for another 15 minutes after this one at night time when everyone is looking to get home. Getting more people on the first train would allow more people to get away quicker and reduce queueing for others.