Someone said the document was dated May 2011, so if not a hoax it could be a very, very early, very, very rough draft. Playing devils advocate, I'm more inclined to think it a hoax.
Another thing, Veiled(3) involves calculating spotting distance (like Veil of Tears) by rollind 2D6 and multiplying by 1.5". To my knowledge GW have never had a rule involving calculating by 1.5 anything.
If these rules are accurate then 6th is going from complicated to ridiculously convoluted.