I was saddened when I heard a rumor about this, and am even more so now that it has been confirmed. While MS isn't perfect, it has been my go-to routing software for years. I'm still using 2010 because to me, it seems to be the most seamless, easy to use, and useful version. Easy to route, nice interface, and easy to export to a GPS.
My favorite feature of MS is the "Optimize Stops" feature, a rally rider's best friend. Very easy to find the most efficient route to many points. I just can't stand the Garmin options, starting with Mapsource, and now Basecamp. It just feels like I'm using old, outdated, primitive software. I don't like the features, and I don't like the interface. I also hate that I can't get maps for it without buying them. I was supposed to have them with my Garmin 665 but they never installed correctly, and Garmin couldn't even get them to work, so I just have what came downloaded with Basecamp.
I'll stick with MS as long as possible. For the few roads that change through the years, I'll take my chances by using software that works well for me, rather than fighting with something I don't like.