The east coastway need an update with the 377 a 377/3 should be added and the London Victoria-eastboirne services should be added the line should be extended to ore and make the time table more recent
387s have some workings on the line now too. That may well increase as GN cascade further 387s to Southern as more 379s become available.
The route needs to be extended to Ore at the Eastern end as well as also getting the branch to Wivelsfield from Lewes. It is such a shame that I have no skills in game development as I would otherwise have been more than willing to have done the work myself on this and multiple other routes.
Along with getting rid of those God awful traction motors and replace them with the new ones present on the 375, and 387...