Quick Update:
I received an interesting question from a developer who wanted to use waypoints in a slightly different way: Setting up actors with waypoints throughout a level and then triggering them based on events happening during play (instead of starting to move immediately after play starts or after a certain delay). I created a beta version (not yet on marketplace) that enables this. This really quick preview video of the included demonstration map shows how it looks:
In the preview, the cone is controlling the cube, using its own waypoint events and the cube’s stop/start moving functions. The cone stops the cube when the cone reaches its first waypoint, then the cone starts the cube moving on the cube’s loop of waypoints again once the (non-looping) cone reaches the end of its own waypoints. I guess, in some elemental way, they dance, and way better than I do! 
The developer who requested the feature helping me test this new functionality and, once we’ve tested it, I’ll submit an update to the marketplace so that anyone who has it will get this functionality as well through the Epic launcher update mechanism.