Maybe a bit 'offline' but if/when the Northern Line gets split there will be a lot mote interchanging at Camden Town, Euston and Kennington, rather than wait on platform at origin for the next train going your way- I dare say this will be taken into account.We're saving that for when the Northern gets split - "Misery" and "Drain".
Actually this is relevant to the Overground as eg the current ex-Stratfords go (at present) 2ph to Richmond and 4ph to Clapham Jct (I think). Representation as one line or two is important. I know nothing about the interoperabilty of Overground stock across its component parts- I'm often confused by a bus 'borrowed' from another route so the wrong 'identity'. For that reason I'm rather drawn to a route number, readily changed on matrix display (Or destination blinds as were!).
I like the idea of colours but it got difficult when the Victoria light blue came in and I would need some convincing about turquoise, light and dark green and yellow/gold etc. The 'pallette' is a lot more limiting than a route number, which people manage to master.No. No more colours. It'll just bulk things out when two or more lines run the same route.
I get the idea that it's about connectivity, but it very clearly says "Tube Map" on the front, yet shows the Emirates Air Line, which I feel confident in saying has bog-all to do with the Underground. Although it has been going down the tubes for years.
It's now halfway between Beck's lovely idea for a diagrammatic map of London's Underground system and Beck's interesting idea of a complete diagrammatic London Connections map. Strip the diagram back to what it used to be but then do a medium-sized version to include Overground, trams, even cycle superhighways. With legible text for those of use who can't manage anything smaller than eight points. Harrumph.
On topic: they shouldn't be named anything, but definitely don't name them after single destinations. We're doing something like that in Leeds now for the buses, and it's cnfusing cathing an Old Farnley Line bus when heading away from Old Farnley into Leeds and beyond.