I think, that Dovetail or Rivet Games, should add the Piccadilly Line to TSW as an Expansion to the Bakerloo Line, or. When Buying the game, you have a choice of Bakerloo Line or Piccadilly Line. If it is an expansion to Bakerloo, make it so the 2 routes are connected, I.E, so, you can get off at piccadilly circus from a Bakerloo Line Train and Hop onto a Piccadilly Line Train without exiting the game and changing routes. The Route: Heathrow to Cockfosters Cockfosters to Uxbridge
Suggested many times before. And it's almost guaranteed to not be connected to the Bakerloo, too many problems would arise from that unless they find a way to deload the Bakerloo while walking to the Piccadilly. It's probably going to be their next Underground Line as Matt did say that they settled on the Piccadilly at first and then moved to the Bakerloo since it was easier.