There is now a new spell fly-out UI feature for warlock pets. Clicking on this single button will open up the list of available pets to summon.
Soul Shards have been removed from the game as items. Instead, they now exist as a resource system necessary for using, or altering the mechanics of certain spells.
Resilience no longer reduces the chance a player will be critically hit by an opponent.
Durability: cloth, leather, and mail now have as many points of durability as plate, making the repair cost on death much closer to equal for all classes.
The glyph system has been updated to now feature three different types of glyphs. Many class glyphs have been added, altered, or moved to different glyph types.
Spell Alerts have been added to notify players when procs on select spells and abilities occur. A visual notification will display around the character and the activated ability will be highlighted on the action bar.
The Guild Interface has been redesigned to incorporate additional functionality, including new sorting and organizational options.
The Arena Teams pane has been improved.
The Character pane has been redesigned. Character stats can now be shown or hidden via the Show All Details/Hide All Details button on the bottom left. When shown, all character stats will be visible in a window to the right of the pane. Stat sections can be reorganized by clicking and dragging them up or down the pane.
The Professions panes now have more filtering and search functionality, as well as buttons to easily link recipes in the chat frame.
A Professions screen has been added to the Spellbook to better display the details of a character's primary and secondary professions.
Many of the yellow System Messages that would display in the chat frame when leveling up have been removed.
New text animations now alert players as they level up, also providing information on when new talents, spells and abilities are available.
Professions and Class Trainers windows have been altered to more clearly display available and upcoming purchases.
New Raid frames are now available. They can also be used in place of the standard 5-player party interface via the User Interface options.
The Spellbook interface has been improved for greater ease-of-use and visual appeal.