Not a big job actually, and were already thinking about implementing a way to go to “blackboard key” that would behave just like moving to actor in terms of observing the goal location. Making it super-generic-and-flexible has its merits, but on the other hand I’d like to keep things simple on the engine level.
Introducing powerful, flexible concepts that few people will use has to wait for better times, when AI in UE4 is a lot more robust. But thanks for the suggestion and don’t hesitate to throw more in our direction. We appreciate every single one of them!