As many of you know the next major content patch will include some very exciting things, such as Ulduar, a new epic raid dungeon, a wealth of new items, and much more. We thought players would especially enjoy reading just a few of the class changes we're currently planning. Please keep in mind, that this list is not at all comprehensive, and more importantly subject to change.
Blessing of Kings – this spell is now a base ability trainable by all paladins.

Exorcism – this spell now causes damage to all types of enemy targets. However, it always critical strikes undead or demon targets. This change should make sure paladin damage doesn’t drop when going from Naxxramas to later tiers of content.

Shield of the Templar now causes your Avenger’s Shield and Shield of the Righteousness to silence targets for 3 sec. The old damage bonus of this talent has been folded into Holy Shield, Avenger’s Shield, and Shield of the Righteousness.

Ardent Defender, Improved Hammer of Justice, One-Handed Weapon Specialization and more have had their ranks reduced.

Guarded by the Light – no longer reduces the mana cost of shield spells, but now has a 50/100% chance to refresh Divine Plea duration.

Judgements of the Just – now also reduces the cooldown of Hammer of Justice by 10/20 seconds and increases the duration of the Seal of Justice stun effect by 0.5/1 second.

They're also nerfing Divine Plea, so healing is reduced by 50% while it is up.