Adam Gershowitz made several posts in the official forums today, providing some insight about patch 1.3 and what class changes are slated to take place. Adam claims the major concern of 1.3 is retooling AoE skills vs. direct skills--mainly by nerfing AoE skills. Bear in mind that not all of these proposed changes are promised for 1.3. In fact, many are being investigated for later patches.

The following are some highlights of each class, and links to the full posts in the Warhammer Alliance Warhammer Online Dev Tracker:

Warrior Priests: AoE radius reduced to pre-1.2.1 values; group healing effective radius reduced; Touch of Divine's cast time increased and cooldown removed.

Witch Hunter: AoE radius reduced; AoE skills reduced damage or increased AP cost/cooldown; positional and situational abilities will have their effects increased.

Knight of the Blazing Sun: Few abilities have secondary effects increased (e.g. Precision Strike); Conical AoE has been changed to fit new CAoE standards (less range, greater arc).

Zealot: Damage on many abilities has been improved; multiple casters can now place different Marks of Chaos on a single ally; Mark bonuses stack with all bonuses.

Marauder : Gift of Brutality, Monstrosity, and Savagery will gain specialty bonuses; Savagery and Brutality masteries have had their effects improved to encourage use of these specialties; adjusted or improved underused tactics.

Magus: Bonus damage from intelligence for high base damage abilities; improved overall damage for Havoc mastery path; addition of specialist tactic to match Engineer's Throwing Arm.

Bright Wizard: Balance changes to tactics that allow players to stack high proc damage; improved damage to immolation and incineration mastery paths; adjustments to "mirror" sorcerer abilities.

Chosen: Conical AoE changes; Strength bonus to high base damage abilities; AoE abilities reduced in effectiveness.

Engineer : Improved damage to Rifleman path; Throwing Arm's bonus
distance reduced; Ballistic Skill bonus for high base damage abilities.

Ironbreaker: Gromril Plating will become a "self-only" damage absorb; Conical AoE will be tweaked; Strength bonus to high damage abilities.

Rune Priests : Oath Runes will now stack with other bonuses; AoE healing radius reduced (shorter distance than direct healing spells).

Choppa : Da Hitter finishers have will have their effects improved; Strength bonus to high base damage abilities; positional and situational abilities will have effects increased; AoE radius reduction, conical AoE changes, AoE effectiveness reduction.

Squig Herder: AoE radius reduced, Pets no longer desummon when mounted, Pets stick to their target to prevent them being shaken off by pathing exploits, Ballistic bonus to high damage abilities, some Big Shootin' and Quick Shootin' abilities will damage increased, AoE effectiveness reduction.

Black Orc : AoE radius reduction, conical AoE changes, AoE effectiveness reduction, strength bonus to high damage abilities, duration of some secondary effects increased.

Archmages : Pathes reestablished: Isha = direct healing, Vaul = hybrid healing/damage, Khaine = direct damage, AoE healing radius and effect reduced, new ability "Energy of Vaul" that drains life from enemies in an area and restores caster's HP.

Swordmaster : AoE radius reduction, conical AoE changes, AoE effectiveness reduction, Strength bonus to high damage abilities, duration of some secondary effects increased.

Shadow Warrior : AoE radius reduced, Ballistic bonus to high damage abilities, AoE effectiveness reduction, Improved overall damage for the Scout and Skirmish Mastery Paths, significantly improved damage from situational abilities, increased effectiveness from some Path of the Scout and Path of the Skirmisher abilities.

White Lion : Pets no longer desummon when mounted, Pets stick to their target to prevent them being shaken off by pathing exploits, Strength bonus to high damage abilities, significantly improved damage from situational & positional abilities, underused tactics revisited, AoE radius reduction, conical AoE changes, AoE effectiveness reduction.

Black Guard : AoE radius reduction, conical AoE changes, AoE effectiveness reduction, Strength bonus to high damage abilities, duration of some secondary effects increased.

Disciple : AoE radius and effectiveness reduction, AoE healing radius & effectiveness reduction, reduced SE regeneration from Chalices, increased healing value from mastery AoE heals, Khaine's Embrace adjustment.

Sorceress : AoE effectiveness reduction, improved overall damage from Agony & Calamity, bonus damage from Intelligence for high dmg abilities, adjustments from Tactics to better mirror the Bright Wizard.

Witch Elf : AoE effectiveness & radious reduction, Strength bonus to high damage abilities, effectiveness of some secondary effects increased, significantly improved damage from situational & positional abilities, bonus damage from stats on "Barb" openers.

If more classes are added to the list, I will edit this post. Please make sure you read the posts in the dev tracker as they contain the full information pertaining to your classes.