Will you add trains that go in tunnels under cities like S Bahns or London overground since most of your routes are regional and seem to leave cities or in countryside areas. Adding something like Hamburg S Bahn in city tunnels will make it cooler than what we already have.
Another underground line (Northern line) in London would be good because it has different lines between High Barnet and Edgware to Morden via both Bank or Charing Cross.
