There would be no doubt for me to change the engine if they only had lite-c in Unreal Engine
The problem with scripting in UDK isn't the syntax of the scripts but the way they are organized... completely different of gstudio, and slightly complicated, at least to me. And scripting isn't the main issue when switching from gstudio to UDK. The whole workflow is much more complex.
Besides that, the vid shows Unreal Engine 4, and I doubt they will update UDK to that, at least not in the next years.
