I like your idea. If you dig around Rory Sutherlands YouTube appearances he talks about how train routers fall down by always looking for the fastest route, where he would prefer the nicest, often cheaper and slightly slower. He has a fair amount to say on the subject so it is a bit of a goldmine.

I sent you some feedback on a routing failure because I didn't want to post exactly where I live here.

I think you need pricing. Works offline is cool, but why not pull in the pricing if people are online? Train fares are so variable depending on time of day, especially if they go via London. I could have a trip that could be £300 cheaper by taking a 30 minute longer trip that avoids London. I need pricing to get my best journey.