It would be awesome if Unreal added that functionality. Before I had heard of the pending release of ue4 I actually was really considering the hero engine as they had 100$ deal. As this even allows say two designers to modify the same level and see each others work live. I feel like this is a great way to improve UE4.
just a note, I am not talking about the live patching that hero engine also does. I really don’t think that is particularly necessary, and I know many avoid using it to avoid problems caused by it.
on another note, this would allow the potential for sort of “in engine” live tutorials. where instructors could not only show within the engine how to do some things, but also allow them to let students try it and have the instructor able to see it.