There are overwhelming information about Reaper of Souls after Gamescom Announcement. Which Feature of Reaper of Souls do you like best, the new class Crusader, the Paragon 2.0 or the Item 2.0? It would be much fun to discuss the new features of ROS.
New Class Crusader: Quote from Blizzard, Crusader is the walking Tank. The Sweep attack and Blessed Shield skills makes them inconvincible. As the new added class, it has all the merits of Barbarian, Monk and Wizard. After watching the Gameplay Trailer, I personally love this class very much. I guess when the expansion comes out, a lot of players would choose this class and explore the world.
Paragon 2.0: You do not have to spend all your time in the paragon leveling for all your classes. Paragon level can be shared across the account. What is more, there would be paragon point to increase the main stats like Strength, Dexterity and Intelligence. You can experiment the point distribution as you like as you can redistribute it whenever.
Item 2.0: This change should be the blessing of players. "Fewer drop with better qualities" is better than fill your stash with the junk legendary items. But would this system turn your current items into junk? Time would answer it for you.
Loot Runs: You can just focus on the monster slaying without thinking about where to find the Elites and Champions in 15-20 minutes. If you can clear the final boss, there should be a huge award for your gallant behavior. You can never expect what kind of Monsters you would come across. The new monster Crossfire would be a big obstacle for you to take away the treasure, maybe.