If this content level was meant only for those who like crazy difficulty levels than there wouldnt have been a gear incease with it. Just a title/mount reward for completing it under x minutes. Once gear gets involved it needs to be accessible for the less hardcore/better progression groups out there so they are not way behind the gear curve.
Also from a business standpoint I am not sure why you would comit the bulk of your content development to an extremely small percentage of players. I am not even sure 5% of those that are raiding (a much smaller group than those that dont) would have been able to down it at that difficulty level.
NiM TFB/SnV gear dropping from easier content when a new tier of gear comes out, the same way HM EC is dropping Black Hole gear right now.