Us Night Elves of course. Sorry my Tauren brothers.
The change to Shadowmeld is in - usable in combat, lose all aggro until it is canceled. In solo play, drops you out of combat entirely, giving you the chance to fly away.
In a raid, Shadowmeld in combination with an out-of-combat res make us the ultimate wipe-recovery, along with our Night Elf priest friends.
I sort of expect a nerf. This is so "OP" I feel guilty ;)
Yet, also very happy!