It has now been 5 years since Uno1982 did a follow up on this issue 5 years after it was opened. A total of 10 years for a simple solution not getting implemented. Using “GetActorOfClass” to find Manager Actors is ok, but it could be much better and simpler to just allow Users to expose the BP Level variables (a feature that has been available in the UI but not functional) and then set the desired Actors from a list of those in the level.
Can this please be escalated for the next release? Does Epic have a feature submission form?