I'm really not enjoying the new Aspect of the Turtle. I feel like the designers saw a chance at giving us another Aspect to go along with the cooldown Aspects that we got, but didn't actually think it through.
There are very rarely any times where I want to use the full 8 second duration of Aspect of the Turtle. In raids, most of the time that you need to pop a cooldown like that, you only want it for a couple seconds to absorb a hard-hitting mechanic, and then you want to go back to DPS'ing. In PvP, using the full duration is more frequent. But overall I feel like it's a large downgrade from having 2 charges of Deterrence. Outside of the fact that 2 Deterrences equaled 10 seconds of immunity as opposed to the 8 seconds of AotT, the utility that comes with having two charges was amazing in raid for negating multiple instances of short duration damage. The only advantage that AotT has is that you don't have to time two Deterrences back-to-back for those instances where your raid is wiping and you find yourself tanking the boss. But even then, two Deterrences timed properly is a longer duration than the new one.
I understand that our specs did all get Exhilaration as a baseline defense heal and that maybe this change is offsetting that fact, but I really miss those 2 charges.
Two other completely unrelated notes:
-Aspect of the Cheetah has too long of a cooldown. Slightly alleviated by artifact talents for BM and Survival.
-I'm really surprised that none of our talent trees have any damage reduction or healing utility at all. Nearly every other DPS spec in the game has some spread of defenses in their talents.