This has probably been requested before, but would it be possible to add multi-object editing support to the Blackboard component? It would be very convenient if it were possible to change the value for one specific variable on multiple blackboards, or to add a variable to multiple blackboards.
It would be nice, but also quite difficult if possible at all, since the blackboard variables are not serialized with Unity default serializer (that would not be possible), but I will take a look.