We already have two CC tiers which hardly have any purpose in raiding, the last thing we need is yet another tier with exactly the same effect.
Why should our T90 work out differently than what attonement achieved over the course of MoP? I'm quite confident that in a best case scenario our T90 will perform on par with WoD attonement (25% worse than MoP) - just that discipline priest, a non hybrid spec, get this feature as a core ability, while we have to "sacrifice" our T90 to achieve the same? For sure it can't be "you get to choose one of three differently flavored ways to do so".
To go into more detail on how I percieve any of those talents:
HotW by itself is an abomination. You have access to about 2-3 spec defining abilites for your offspecs and lack any form of advanced class mechanics. Mastery, about 70% of the rotation, the cooldowns associated with the specs - all which make those specs perform where they're supposed to stand. T100/perks just makes this even more of a problem. Actually I'm quite confident that the complete lack of a class toolkit was one of the reason no one bothered with HotW's hybridity part outside of Tranquility. Why tie yourself to a boring 2 spells for 45 seconds, sacrifice your entire main role, and still perform subpar on your chosen secondary role (either because numbers were off, or in the case of healing more likely, those two abilities just weren't enough to have you perform at the desired level)?
As for NV? Resto will pick it because it increases healing, where this is either because of an oversight, or more likely, because it would encourage bad gameplay otherwise (to actually achieve non-negligible DPS you have to waste a huge ammount of mana). For non-resto specs, what performance do you expect this talent to have in an enviroment, in which blizzard just removed all raidcooldowns from non-healspecs? Either it'll become a requirement (you're the only DD with a raidcd) or you just don't pick it (DoC will may at least provide you with self-sustainablitity)
As for DoC, if it provides druids with enough healing to self-sustain their HP at comfortable leves (remember: goal is you can savely stay below 100%), they'll become required for mythic raiding as you're allowed to drop healers in favor of more DD's. If it doesn't, what's the reason this talent is there to begin with?