Is it too late for Blizzard to fix our holy tree now? Most likely, but I'd like to voice my opinion on holy talents anyway, and how they could be made more desirable. Seeing how we are supposed to be the ultra defensive healer in the game, why couldn't our talents reflect this?
Aura Mastery - "Increases the radius of your auras to 40 yards."
Talent removed. The radius of all auras is now 40 yards by default, and have their own, separate GCD.
Purifying Power - "Reduces the mana cost of your Cleanse, Purify and Consecration spells by 5/10% and increases the critical strike chance of your Exorcism and Holy Wrath spells by 10/20%."
The critical strike chance portion is removed. In addition to reducing the mana cost as before, it now also reduces the global cooldown of Cleanse and Purify by 0.25/0.5 seconds.
Blessed Life - "All attacks against you have a 4/7/10% chance to cause half damage."
Talent removed, as this is completely useless and too RNG-ish. I think that instead of this, we could have a talent to augment the lackluster Divine Illumination. Make it increase the critical strike chance of all spells cast while under the effect of Divine Illumination by a certain percentage and lower the cool down of Divine Illumination?
Light's Grace - "Gives your Holy Light spell a 33/66/100% chance to reduce the cast time of your next Holy Light spell by 0.5 sec. This effect lasts 15 sec."
Now provides a passive reduction of 0.25/0.5/0.75 seconds to Holy Light. (or reduce it to 2/2 talent points with 0.25/0.5 second reduction should 0.5 second Holy Light's with IoL be too overpowered). Or in the very least, make Light's Grace proc from Holy Shock or even Flash of Light as well...
Sacred Cleansing - "Your Cleanse spell has a 10/20/30% chance to increase the target's resistance to Disease, Magic and Poison by 30% for 10 sec."
RNG mastery removed. Now reduces the chance of your Cleanse spells to be resisted by 10/20/30% and for every harmful effect removed, heals the target slightly. Cleanse is our bread and butter in PvP, make it useful again, please?
Judgements of the Pure - "Your Judgement spells increase your casting and melee haste by 2/4/6/8/10% for 1 min."
In addition, now reduces the global cool down of your Judgement spells by 0.3/0.6/0.9/1.2/1.5 seconds.
Beacon of Light - "The target becomes a Beacon of Light to all targets within a 40 yard radius. Any heals you cast on those targets will also heal the Beacon for 100% of the amount healed. Only one target can be the Beacon of Light at a time. Lasts 1 min."
Mana cost reduced. No longer dispellable.
On top of the holy changes, Pursuit of Justice could be moved to T1 protection and Improved Blessing of Kings removed (effect folded into the 1 point Blessing of Kings talent). I'd hit holy instantly even with some of these changes made.