Sounds extraordinarily wish list-y, to be honest. That "any unit can pick Tank Hunters/Zealot/Infiltrate, Hit and Run and Fleet/Furious Charge and re-roll morale" sounds far too good to be true. In the age of Necrons and Eldar, I'm not ruling it out completely, but I'm very skeptical.
EDIT: Man I would hate to be the Dark Eldar player who fights a Death Guard army. I hope you brought a shitload of Disintegrators, because your infantry and Venoms are now literally useless!