I would love to see this as the networkers will get an upgrade and I really would want to see the sehs route get an update.
It is highly unlikely that SEHS will see anymore additions beyond a possible remaster down the line for lighting improvements and onboard announcements. The present rolling stock will probably remain unchanged on SEHS as it is set in a particular time era and any additions would be more likely in a new route between Gravesend/ Dartford and London Charing Cross. Then that would bring about the "more info" requests.
I'd love another route where we can drive the 465, but I'd rather we had a mainline route where the 375 can be used as well.
Would be brilliant one day when the core issues are sorted if we could have the Beam Line and the bit to Dartford AND the Victoria to Faversham via Bromley sections with upgraded Networkers, 375s, 390s, 707s and new traction in the form of those dreadful 376s. I'm sure they're fine to drive, I just don't like them from a passenger stand-point. It would be like the SEHS re-release but for slower South Eastern trains. 2 ways of getting to Gillingham and a choice of London Terminals would be superb but possibly far too large. It's noticeable that DTG have tackled the mainlines from London that don't have elevated sections through the densely populated inner suburbs. Only the shorter London Overground routes do that.