Lite-C is more then a scripting language, the code itself gets translated to direct assembler, the question is how good this translation is.
And seriously, if you create a multiplayer game dont even think about the word unity. Even the greatest retards can drag a dll into their project and use YOUR classes and functions because .net code isnt secured in any way.
UE4 reversing is not even close to what happened to UE3.
On UE3 you are able to dump a whole SDK for your game hacks by injecting a DLL to the game. But Im sure the same will happen to UE4 some day