I wish there could be an alternative in Watopia or maybe a new route that offers a long ascent of > 200m of height elevation. That could be great for long efforts in mountain. Thanks a lot for your support
next time you ride through the underwater part (Ocean Boulevard), look out for the construction signs in the section between the two tunnels for a teaser.
The construction signs says the Watopia mountain route is coming soon, so from that I would speculate its going to be an extension with more/bigger/longer climbs or some combination thereof.
Eric (Zwift CEO) says its coming soon in response to your original question, so my guess your wish will be fulfilled in the not too distant future.