1) All stations should have a buffet, staffed 7-9.30 and 16.30-18.30, serving a morning menu of bacon sandwiches (with vegetarian/vegan options before anyone points that out) and an evening menu of chocolate and blueberry muffins (with options to allow for allergies). This could be integrated into the ticket office (where one exists). The only exceptions to this rule are Elton & Orston, which would have an expanded menu (sausage sandwiches for breakfast, strawberry muffins for the evening, and orange juice on the drinks menu) and Doncaster, which can keep the Subway shop on platform 1.
2) All future new-build stations should take architectural inspiration from Ely Cathedral, with waiting shelters modelled on thatched cottages.
3) Rakes of spare Mk3/Mk4 coaches plus a couple of locos should be kept at Laira, Reading, Longsight, Canton, and York, and crew trained on them so relief trains can be run if certain trains are overcrowded. If Blackpool trains are overcrowded, serves them right for going to Blackpool.
4) Trapdoors should be provided beyond the yellow line, to be activated by staff whenever a fast train is approaching, whenever doors are locked closed ready for departure, or whenever there is a passenger on the platform who is being excessively irritating. The provided trapdoors should lead into a passageway lined with speakers playing The Mudlarks' cover of Lollipop on repeat.
5) Long-distance trains should be provided with one hotel-style television per carriage, with each seat provided with controls. The resultant fight over what is shown will make the journey go far quicker.
6) The St Albans Abbey line should be turned into a heritage electric line. 750v DC preserved stock can be used on Epping-Ongar, albeit hauled.
7) All subways in London should play classical music, to deter antisocial behaviour and to create places where young people who actually enjoy it can gather without being invaded by the stereotypical lot.
8) On the first Sunday afternoon of Advent, all station announcements are to be done by local priests, with a sung Gloria at the end of each.
On a more serious note (though this is a fairly light-hearted thread anyway), the only thing I would like to volunteer that isn't too dangerous is that the 720s are great trains and the seating is fine. And yes, I do know people who are older/taller/wider than I am who share my opinion!