Hello again! 
For this sort of use-case, I would honestly first look into making a custom actor/component type like “SteeringWaypointActor” or something. Basically, an actor with a transform and maybe some steering parameters (e.g. how fast to reach this waypoint, how much to ease-out when reaching it, maybe even a next waypoint to continue towards, or maybe that actor can actually have more than one waypoint, like a spline or something).
This gives you potentially more bang for you buck:
- You don’t need to mess around with custom Sequencer tracks. You add the actor in the Sequence just like any actor, and you can animate it or place it as needed for a given cinematic. You can make it a Spawnable if you only want it to live as long as the cinematic.
- You can also steer your characters towards a given waypoint without Sequencer, such as some Blueprint-based mission scripting or whatever.
Would that be a viable solution for you?