Meh. Draenei had the Light first, and only adopted that other stuff later.
Further, it is impossible to incorporate the Light into our culture without changing our culture, because using the Light involves using a certain kind of thinking. If our current culture and the mindset of its inhabitants was already amenable to using the Light, we would already be able to use it.
Basically, if a culture can be said to consist of memes, then the use of the Light involves adopting memes contrary to our current mindset, and I don't want that. It may not be optimal from a gameplay standpoint, but I want to keep the Mag'har as the Mag'har. I've already noted that I dislike Thrall's Human-influenced designs for his nation - adopting the Light on any significant level would be equivalent to adopting a mindset akin to the Draenei or the Humans.
If we were to adopt the Light, then I would not approve of it if it were to remotely resemble the way the Humans or Draenei use it. Something more akin to perhaps the Tauren's Sun-Light bollocks, well, I might approve of that, if the Sun is considered a Spirit or the home of a powerful Spirit or something like that.