I'm not sure if there is a relation but I'm guessing they're working with a virtual cloud for the servers? It has the benefit of being able to create virtual enviroments that can be moved around on the physical servers depending on high work load. It's very flexible, buuuuuuuuuuuuut in order to do that there is a wall separating the physical machine coding (cpu) and virtual enviroments (that handle the game). I'm guessing that's why the LUA is needed.