Paragon 2.0 "Paths of Valor": you now spend points yourself across four branches (Might, Offense, Defense, Utility) and pick seals every 100 levels. One point per Paragon level, up to level 1000, available from level 80. Rested Paragon experience doubles your gains while you are offline. After the update your Paragon level and experience are kept and all points are refunded — spend them again. Open: talents window (N) → "Paragon" tab or /paragon. Guide: Paragon 2.0.
Valor Forge: item tempering up to +10 (+2% item stats per level), reforging 40% of one stat into another, and 10 engravings for weapons and cloaks. NPC Zal'Taris the Fate Reforger stands at the gates of Orgrimmar and Stormwind. Guide: Valor Forge.
To update, close the game and start the launcher.