Updated Pin behavior; Bug fixes.
Nice to see the pin behaviour get some love. But I really think "destroy with parent" should be added as a property as well. You almost always want to destroy a pinned object when the parent is destroyed, so would be a nice addition as well. That is why i use the Pin+ plugin. Just a nice to have instead of taking care of it with an extra event :)
Aekiro's GameObject plugin can help do this :)
I know it's not as flexible as you're hoping but you can accomplish that with containers. But I do agree, for added flexibility it would be able to destroy the pinned object on if the "parent" is destroyed.