UE4 has Python already. I don’t like Python, but I think it can be extended to game scripting system.
On the other hand, I don’t care for any typed script/code since I discovered Blueprints. All is needed is the ability to version Blueprints, maaaybe diff them.
With the way things are with UE4 development, efforts and resources should be spent on improving and enhancing what’s already in the engine, not adding stuff only Unity migrants will be using, IMO.