It's actually better than that:
Enhanced Camouflage
Requires Hunter (Beast Mastery, Marksmanship, Survival)
You heal 3% of your maximum health every 1 sec while Camouflage is active.This will actually screw over casters pretty hardcore. Rogues are actually still fairly easy to peel even when they're in Subterfuge because a) you can still see/hit them, and b) you have a pretty good idea of where they are so it's easy to use AoE CC's on them.Improved Camouflage
Requires Hunter (Survival)
Camouflage no longer breaks from dealing or taking damage.
Hunters on the other hand are completely immune to ranged attacks in Camo, even if you can see them. So this will guarantee an opener for Survival Hunters and give them 6 seconds of additional immunity and also provides an amazing defensive cooldown where they can heal for 3%/sec for unlimited duration until they attack/get hit (so casters, go swing your Staff at them), and then still get 6 seconds of immunity on top of that and an additional 18% healing.
As of right now, a 3s comp of Survival Hunter/Boomkin/Healer would be absolute AIDS for a lot of caster cleaves (Boomkins are getting 2 charges of 70% damage reduction on separate 2 minute timers). Most likely with an RSham healing.