Originally Posted by
voidillusion
That relation can't be established, that or any other. Any change to the game, unless it has a radical impact on the game and population itself, can only have it's impact observed over the time and not imediatly.
But as i said before, to claim LFD+LFR is the only reason for a population decrease would be foolish, altough my opinion, having played before and after the inclusion of both tools, is that the game didn't need them at all, and having them implemented dumbed down completly the 5 man content. You could argue that the game is for raiders blablabla, but you shouldnt understimate the need for that kind of content for many, many players.