Summary
A fan datamine tracker (wowforeverbuilds.com) of the first beta client build reports: 4,876 new items, 51 new item sets, and 1,135 re-itemized items; 42 new mounts including a Black Devilsaur Mount; 230 new class abilities across all classes (talents, set bonuses, trainer spells, relic effects), including newly named trainer spells Call of the Elements (Shaman), Pinch and Savage Rend (Hunter), and Teleport: Dalaran (Mage); and 60 new talent spells split unevenly across the nine classes (the tracker names Paladin 16, Hunter 10, Priest 7, Rogue 7, Warlock 6 as the largest shares). Single fan tracker, not an official Blizzard source or independently corroborated - Reported confidence only.