Source: mmo-champion.com summarizing the changes to the official talent calculator on the upcoming changes to the beta:
Paladin
Holy
* The amount of health point healed by Holy Shock has been increased by 66%. (eg. Rank 7 now heals for 2401-2599 instead of 1431-1549)
* Infusion of Light now reduces the cast time of your next Holy Light spell by 1.3/2.5 secs instead of 1.25/2.5 secs.
Protection
* Holy Shield will now give you 6 charges instead of 4.
* Avenger's Shield mana cost reduced by 70%, damage has been reduced. (eg. Rank 3 now deals 494-602 damage for 780 mana instead of 705-861 for 1745 mana)
* Guarded by the Light now reduces the mana cost of your Consecration, Holy Wrath and Avenger's Shield by 15/30% (Old version : Whenever your parry or dodge an attack you have a 10% chance to reduce the mana cost of your next Consecration, Holy Wrath, or Avenger's Shield spell by 25%/50%)
Retribution
* Improved Blessing of Might now increases the attack power bonus of your Blessing of Might by 10/20/30/40/50% instead of 4/8/12/16/20%
* Vindication now has a chance to reduce the target's attributes by 10/20% for 15 seconds. (Old version : 5/10% reduction)
* Pursuit of Justice is now a 2 rank talents (was 3), reducing the change to be hit by spells by 1/2% and mounted movement speed by 9/15% (Old version : 1/2/3% hit and 5/10/15% mounted speed)
* Repentance now costs 395 mana instead of 9% of base mana.