Not much to go on so far but it's still a good video from MoreConsole.
By the sounds of it, RAID 5 will be out within days of the launch. I'm really hoping that doesn't mean we can easily grind our way there that quickly. Making the raid a place that looks real is a good news story. What needs to back this up though is the crucial raid mechanics.
I think they learned a lot from Kings Fall illogical and non-sensical mechanics like running around in a circle to stay alive, and put some of those things right in WotM.
With them looking at the death penalty too, we've just gotta hope they don't make the mechanics too easy, not because the mechanic itself is but that the factors around make it ultra easy to cheese because easy revives or have all Warlock raids for example.