If you have complex prefabs trying to get the top most entity (Parent) can be very tedious. As scenegraph is used more and prefabs become the new normal for big games i feel it would be a huge benefit to have a simple api that is like GetRootEntity which regardless of where called inside a entity within a prefab it will get the parent entity (The prefab entity) as some prefabs have multiple levels of parents/child so this would help so much.
This would also eliminate the issue when sometimes you GetParent and this is the sim entity (You think its the prefab) and you RemoveFromParent and crash the game.