This thread is as good a place as any for discussion.
Also, keep in mind that the linked changes only include changes to class and spec abilities, and does not include the new talents which can definitely have an impact on how the abilities may be viewed.
1. WoG actually seems to be nerfed quite a bit for Holy since Walk in the Light's +10% all healing and +30% WoG healing has gone poof. Plus, it now seems to invoke a 1.5 second non-global cooldown, which is at best equal to and at worse half a second longer than Holy's current global cooldown (which is dependent on haste). I'm sure, though, the latter is mostly to prevent shenanigans with Holy Avenger or Divine Purpose. However, when you consider the changes in conjunction with Protection and Retribution changes that allow each point of Strength to also grant 1 spell power (I haven't seen anything that indicates that Intellect will grant more than 1 point of spell power in MoP), it's possible that all of the shared heals will heal for roughly the same amount regardless of spec.
2. Yeah, the aura changes make me really sad. Auras are such an iconic part of WarCraft's Paladin class, and I'll be sad to see them go. Personally, I wish they'd at least bring back as activated, non-passive buffs (similar to weakened versions of pre-4.3 Holy Radiance or the current Divine Guardian).
3. & 4. Even healers need some way to deal some damage for things like dailies and PvP. Currently we have a spammable offensive nuke in the form of Exorcism, but that's becoming Retribution-only in MoP, so Holy Wrath is essentially just filling in as a replacement with the added bonus of building the current Denounce talent into the base spell. Plus, it seems like it could have a small "oh crap!" usage by taking critical hits off the table if a non-tank has to pick up a mob for a short time (such as if the tank dies and is being battle rezzed).
But really, though, I remember being jealous of Lightning Bolt, Wrath, and Smite back before Exorcism was turned into a spammable nuke. It really is something that seems unnecessary only until you have to play without it for a substantial amount of time.
E1. Plus, it means that if there's a substantial lull in incoming damage for a while, you can keep using Holy Shock for longer before you reach the point where you just waste the charges on a mastery bubble.
E2. Yep yep yep!
PS: Bonus points if you read that last line in Ducky's voice from Land Before Time.
