The recent course expansions have included the Alpe climb plus the Surrey Hills (Leith/Keith) along with the more rolling London road (extension for Greatest London Flat) which avoids Leith/Keith and Box/Fox. Road to ruins, if I’m remembering it correctly, is also more rolling and flat.
I’ve see many riders on the Alpe climb since it opened.
On other days I see more riders on Watopia flat, turning left to the underwater tube rather than up the original Watopia hill. Traffic is denser on London flat roads than on Box/Fox and Leith/Keith. And on the few Richmond days, most don’t use the full UCI course with the three rollers at the end. The flat route is a river of cyclists on the few days Richmond is on the calendar.
Personally, I see that the Alpe fits a niche, but I had hoped more for spring classics type of terrain, as seen in the Ronde van Vlaanderen or Paris–Roubaix. Of course, the climbs of the Tour are more famous in much of the world than the spring classic courses, and I expect the Alpe du Zwift has an appeal there. Maybe there will be more rolling terrain in the next expansion or in the new world we might see later this year.
Then again, if most don’t choose the UCI rollers in Richmond, would they choose a rolling course in a Belgian-based world? Maybe Zwifters prefer the visuals where we’re going at more of a 30+ kph speed rather than a 10+ kph speed.