Holy
•Chakra: Chastise Increases the damage done by your Shadow and Holy spells by 50%, grants a 10% chance for Smite to reset the cooldown of Holy Word: Chastise, causes Smite and Holy Fire to cost no mana and refund 0.75% of maximum mana, and transforms your Holy Word spell back into Holy Word: Chastise.
So, we will have to change to Chakra red and dps for manaregen. This was something of the worst I could imagine for "active manaregen model".
Let's compare to other classes regen:
Discipline
•Atonement no longer works with Penance.
•Penance now costs 2.9% of Base Mana, down from 3.1%. Now also restores 2% of maximum mana when damage is done. (for each tick I will add, so 6% - cost for Penance)
No stance switching, short CD and optional to use Penance as heal or manaregen at any time.
Monk
•Crackling Jade Lightning (Mistweaver) now costs 21.3% of Base Mana. Now is a 4 sec cast, down from 6 sec. Now also refunds 2% of maximum mana if channeled for entire duration.
Holy Paladn
•Divine Plea (New) Instantly regain 4.5% of maximum mana. Paladin - Holy Spec. 3 Holy Power. Instant.
No limitations or restrictions what so ever! Cost is 3hp but I can't see there is no CD to this any longer?
Restoration Druid
•Innervate (New) Causes the Druid to regenerate 2.50% of maxmimum mana every 4 sec for 8 sec. This effect is cancelled if the Druid spends mana on a healing spell. Druid - Restoration Spec. 30 yd range. 2 sec cast.
Again, no need to stancedance and DPS. (Seems they removed the CD on Innervate to??? Really? Or did they forgot to add CD on it?) So all they need to do is stop healing for 8 sec to regenerate mana, dps is optional. Edit: There is also synergy with Dream of Cenarius. Wrath isn't a healing spell, so you would be able to take that talent and spam Wrath while the Innervate buff is up and get the Atonement-like light healing from it.
Restoration Shaman
•Telluric Currents - Your attunement to natural energies causes your Lightning Bolt spell to restore 1.25% of your maximum mana instead of costing mana.
Use Lightning Bolt whenever you see fit. No need to switch to dps Chakra and no limitations. On top of it, LB resores twice the mana Smite or Holy Fire in red Chakra
Seems to me again Holy Priest will have the most clunky active manaregen. We have to first do a Chakra change into dps, then dps for mana while being able to do only weaker healing while in red Chakra. If we want to go back to healing we can change back after 10s, but then we have no chance to throw in a dmg spell to regain mana.
This is crap to me. We are already limited in AoE Chakra and ST Chakra-stances. Another restriction is NOT what we need...
EDIT "Clucky"="Clunky", but it could fit with Clucky to... hm, yeah, maybe that's the better word