In this patch, a large number of changes are made to improve the order and flow of abilities gained while leveling all classes.
In many cases, the level 1-10 abilities that introduce the class have changed.
Many special bonuses and features for class abilities are now granted by upgrades that are learned at a later level.
This applies to every spec for every class other than Death Knights and Demon Hunters.
Examples:
Druids below level 10 now use Wrath and Moonfire as their primary damage abilities, rather than Shred and Ferocious Bite.
While Smite will still be the first spell given to Priests at level 1, the added absorb shield effect will be an upgrade learned by Discipline at level 36, as the purpose of that effect is to add to healing in group content.
Rogues will start leveling with an ability that attacks with one weapon and generates one combo point. Rogues who choose Assassination specialization will replace that ability with Mutilate at level 40.