This would be super useful.
Currently Blueprints can’t have devices in them. They are useful for Static Meshes and having re-useable decoration scenes, but for any “scripted” prefab it’s super annoying to have to copy/paste changes to would-be instances.
By the way, I’m aware of the existence of Playset levels that can turn in UE “prefabs”. However, these are very bugged with UEFN devices right now and changes don’t reflect to instances regardless.
If Blueprints were to support devices, and possibly (but not as important) including Fortnite props, that would be a huge time saver for creators.