The new name removes the possibility of corporate conflict, describes both routes in the context of their geographic location, and allows both the NS_AND and the Southern Rails route to exist side by side. However, I think that once you see the new and improved version of the route, you will prefer it over the older one hands-down.
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In the previous post, I mentioned a timetable for release of the Southern Rails route. After further consideration, there will be no release, either partial or whole, of the route until after future versions of the RCAP packages are released. After working the route for a couple of weeks, it is very apparent this is going to be almost like building the route from scratch, so it's going to take a lot of time, and more assets than we currently have to get the job done. I can assure you though that it will be worth the wait.
Current Progress
February 25, 2013 - Work in progress at Milepost 5.5 west (Alton Park): Total urban construction, new asset creation.
February 13, 2013 - All non-core Kuju assets removed from the route.