I kinda do, but I don't see how it would explain the problem. Especially if there is such a delay, we might still be able to argue that the Light can exist without the Void. Can you elaborate on your ideas a bit further?
I'll have a go, its a bit tricky to articulate what I mean (A rare situation for me, who prides himself on being a wordy son of a b*tch)
Its like, if you go into a dark room, with some furniture in it, there is just nothing, It is dark, but it isn't shadow, It's just darkness, which isn't the same thing as shadows. You have a torch, you turn it on, suddenly there is Light, but the Light doesn't reach everywhere, it can be the best, the brightest torch ever, but it won't reach everywhere. However you move it, wherever you position it, it will never illuminate the entire room, there will always be places of Light, and places of Shadow.
Now imagine you could visibly see the Torchlight expand into the darkness, and the places that it does not light up, that said process took time, time enough to witness the formation of those Shadowed areas where furniture is blocking the Light. The Shadows did not exist until you turned the torch on, and slowly came to be as the Light Expanded, and was blocked by obstacles obscuring the light.
Even as I typed that metaphor I realise the essential problem, which actually does apply to the Warcraft universe. What, in that metaphor, is the furniture? What is it that stops the Light simply illuminating everything, and preventing there being any Shadows, or Void.
The same applies, it is said the Void did not exist until the Light did, yet the Light came first. There must be -something- that stopped the Light reaching everywhere.
What that is, in a cosmological sense, I have no idea, apart from the axiom that 'Nature abhors a vacuum', and if we take a 'Vacuum' to be an absolute state of one condition, to be filled by something, so absolute darkness or absolute light would constitute a vacuum, something must oppose it, even if passively. Just as you cannot have shadows, without a source of Light, so too can you not have just Light, as it then ceases to be something quantifiable, it just -is-, there is nothing to measure it against, because there is no contrast, the very fact that it is universally prevalent means that it just -is- the reality, and we wouldn't even have a concept of what is the opposite.
Like, if we lived in eternal sunshine, we would have no concept of night, and vice versa, one had to have come first, in our consciousness of them, and in the WoW universe it was Light.
Heck, its a difficult one to explain....