I'm not convinced Bungie is intentionally tailoring raids to any one class. Warlocks emerged for a time as the "preferred" class on VoG as their grenades were the best for certain cheesy elements and of course self-rez is useful for any high-end content. But honestly I don't think any class really stood out in VoG over the others. On the other hand, I would say Hunters are the most useful class in Crota's End by far. Their agility and especially their invisibility makes them the top choice for the lamps, the shrieker hallway and the Crota fight itself. Can you get through these things with other classes? Sure, but it's easier with a Hunter. Again, I'm not sure this was Bungie's plan all along - these are the strategies the community has gravitated to, but that doesn't mean Bungie intentionally set them up. We'll see what happens when HoW drops.