I was aware of some experimentation taking place (Barkingside area?) but not any further spread of what I agree are pretty unhelpful mutations of spider maps.
But then if they have spread like wildfire since 8th May I would be unlikely to be aware, because NOTHING in the way of new or updated spider maps has appeared on line since that date, over SIX MONTHS ago.
The result is that the current on line map for Edgware still shows the withdrawn route 305 and the old routeing for route 303, The two routes were subsumed into an altered route 303 back on 1st September. I do not know whether what is posted at stops has been revised.
Electronic information systems are wonderful but users are entitled to think of them as up-to-date in a way that they would not for a hard copy equivalent. Their usefulness is eroded if keeping them accurate and up-to-date is considered to be an optional extra.
There has, I am sure, been bucketloads of research which shows that many people have difficulty with maps (and timetables). This is why geographical maps and matrix timetables have been replaced by (rather than supplementing) spider maps and stop specific timetables. Now presumably we have more research which suggests that many people have difficulty with the normal spider maps, hence the attempt to turn them into a parody of what you see in tube trains.
The question that never seems to be asked is this - how many of the people who say they can understand style B but not style A actually bother to use style B if the change is made? If the answer to that question is “hardly any” then the loss of utility for those who did use style A is unjustified - you might say that dumbing down would then be really dumb. What people say in focus groups differs from how they behave in reality; it seems to me that many simply cannot be bothered.