Horsham station is not just down the road from Ockley (which is exactly half way between Dorking and Horsham). Its 6.5 miles to the south of my home or a 15 minute drive in normal traffic, which would negate any advantage in travelling there given that the fastest 52 or 53 minute services to London Victoria from Horsham are not exactly rapid.
Also South London Metro is as far as I'm aware a long redundant concept (it used to appear on rail maps but no longer does) that we ceased to be part of south of Dorking when whatever the old sliding door trains without loos were entirely replaced by Electrostar stock several years ago after the power circuits from Dorking to Horsham were also appropriately upgraded and the then semaphore signalling south of Dorking was replaced with modern coloured light signalling and all the old manual signal boxes (eg at Warnham and the manual switching point at Holmwood when trains used to terminate there) on the line done away with.
It is totally and utterly wrong in my view that any stations south of Epsom are treated by GoVia as a part of its slow, stopping at all stations South London Metro service and instead we should be being made a part of Thameslink services via Sutton (see for instance
https://news.surreycc.gov.uk/2016/01/08/crossrail-2-could-go-to-dorking-and-should-extend-to-woking/ and this article of some years ago at
www.getsurrey.co.uk/news/local-news/go-slow-faster-train-service-4848176) given that Network Rail and GoVia apparently have no ambition whatsoever sort out the ridiculously snail paced blockade to decent train services that is Sutton to Clapham Junction. There is also this proposal for a completely new Mole Valley link to the faster Woking lines in to Waterloo at
https://ukrail.blogspot.com/2013/03/mole-valley-link.html
Semi Fast Trains (not stopping Sutton to Clapham Junction but has now become Carshalton to Clapham Junction) used to only take a vaguely acceptable 51 minutes from Ockley to London Victoria back in 1991 but via numerous timetable slowing downs over the years (which now result in trains often waiting at signals in stations waiting for the officially absurdly slow timetabled time to clock round) and the addition of Boxhill as another compulsory stop this has some how shot up to the current outrageously slow 68 minutes.
We still have to pay as much for this lousy service as commuters from Horley pay for a much better four trains an hour service to both Victoria and London Bridge and it seems that those of us living on the Mole Valley lines enjoy a Cinderella service from the GoVia group, who's only focus of recent years seems to have been on ever more passenger capacity rather than faster services. But with the vast permanent drop in passenger numbers it seems to me that the focus ought to switch back to giving those who do travel to London a decent fast service to the Capital............