I was a bit underwhelmed when they said they weren't getting out at every station. But then I pondered it and it made a bit more sense to me. Visiting every station and ticking them off to say you've done it is great - documenting it a bit further with a photo is cool too (and a great many have done it). But getting out and setting up to film something? Not so much.
For every station that you could get out at and spend ten minutes talking down the camera saying something notable about it, there's probably umpteen more stations of little note. Even if you did five minutes, that some 200-odd hours of film, unedited. So that's not happening. I suppose a happy medium might've been a photo at every station, then to talk about the notable ones. One an average line it might add about five minutes worth of content, but to *produce* it would probably take hours on end.
I watched Geoff and Vicki's live updates on Youtube, and I got the feeling Geoff had his producer hat on when they decided to do things the way they are, because the logistics of doing otherwise are just too hard. Researching, filming, editing, and post-prod on all that content would be a massive job, so it makes sense they've had to do it the way they have.
HOWEVER! Calling it 'All the stations' is a bit of a liberty imho, and they probably could've called it 'All the lines' as that'd be more proper.
But either way, fair play to them. It's a lot of travelling, and it should produce an interesting document of the British rail system in 2017, and I'm all for that.