Having more realistic station advertising and maps on routes really ups the realism and makes them feel more authentic, routes like Birmingham cross city and the latest tsw 4 routes are good examples. Get rid of the custom routes maps as they feel out of place and don't fit the style of the stations and the route as a whole and replace them with real maps of the TOC’s routes for us to collect.
I can see that licensing would be the main issue here. But when I think about it, a company allows their branded train in the game, why not their advertisements? A bit odd, really.