A large number of changes have been made to the game's difficulty to support the intent of playing efficiently, rather than overcoming an obstacle
Diablo III is now updated to v1.0.4 in North America, Europe and Asia, Blizzard announced. Patch 1.0.4 introduces a new max-level progression system called Paragon. When a hero reaches level 60, experience earned will begin to count toward Paragon levels. There are 100 Paragon levels in total, and each level will reward players with a permanent bonus to Gold Find and Magic Find as well as core stat increases (Strength, Dexterity, Intelligence, and Vitality). For every 10 Paragon levels, players will also earn a new hero portrait border which will display in the in-game party frame. This border will not only become more impressive as you level up, it will also display your Paragon level in any place where your normal hero level is shown.
Significant changes have been made to Legendary items to make them more powerful, more memorable, and ultimately more fun to use. Through the addition of spell procs, many Legendary items now have a chance to activate rare and unique abilities, such as summoning an angel to fight with you, conjuring an icy projectile, or igniting the very ground you walk on. Legendary items in 1.0.4 are also far and away more powerful, possessing higher damage and affix values than their predecessors. In addition, many Legendary items have had visual effects added to their original models, giving them a distinct and detailed flair.