I understand your point but there really is no actual point to reinstate the service?
Waterloo is relatively close to London Bridge 2 stops on the tube and faster to to go to Waterloo.
Dorking has 3 different stations to serve it
If passengers from Guildford want to go to Croydon they can do so by taking a train to Clapham Then changing or onto a train to redhill then changing there
Both take around 50 minutes
Dorking and Guildford both have great connections already
But why would anyone want to go to Croydon nothing is really there
My extension has nothing to do with end to end usage, it is purely for the different connections provided along the route.
In a similar way, I would be surprised if anyone between Guildford and Effingham Jct travelling to Waterloo would choose to use the Waterloo to Guildford via Epsom service all the way since the services via Cobham are much faster.
The connections provided by that service that are not provided by any other service are: Guildford / London Rd / Clandon / Horsley / Effingham Jct / Bookham to Ewell West / Stoneleigh / Worcester Park / Motspur Park / Raynes Park (and Bookham to every station on the line)
New connections between Guildford and Sutton/Croydon would likely be much more used than those links, and every one of those lost links is easily provided with a cross platform change at Epsom.
Fair point about Croydon, but I would take a good guess at the link being used more for travelling to/from Guildford, for reasons stated in my last post.
The issue with changing at Clapham Jct is that very few fast trains from Guildford actually stop at Clapham Jct, especially in the peaks.
Not sure what connections to Dorking has to do with it, I just said that a more frequent service from Dorking to Waterloo would be very useful.