Hello!
My Hierarchy view improvement add-on is now available in the Asset Store!
It improves the existing Unity Hierarchy window to give you more information on your prefabs/scene structure!
It also includes a neat button for applying prefab changes to already existing parts of the prefab already (i.e. it doesn’t ‘merge in’ other nodes or prefabs that are underneath it within the scene). I’ve called this ApExO (Apply Existing Only)
I’ve added the hide/unhide feature (in asset store submission now - will be a couple of days before it is live!). I’ve also added a few settings so features can be turned on and off as needed.