Can’t imagine why Crossrail would make any difference,
it would depend what station you live at, and where you’re going to.
One thing I haven’t been able to work out on the Central line is why Ealing Bdy gets the “Trains to Heathrow” flag. The style guide says this means “Rail interchange with service to airport,” and indeed everywhere else I’ve always taken this to mean it is used only to refer to National Rail (or Heathrow Express) links to Airports, and the service to Heathrow from Ealing Bdy is the Crossrail service.
The Jubilee line Car line diagrams put Canning Town as just an aeroplane pictogram and then “London City Airport.”
I’m not exactly sure what exactly they’re trying to show here, unless when through services start running they will add this flag to all Crossrail stations (in which case it’ll get cluttered).