Because you have not played the game, you are not used to all the animations. Once you have beat the game 15-20 times, you get used to doing everything and there is no unpredictable elements anymore.
I don't think D3 should be like an explanation, to D2. They changed the talent tree, and added runes, but they need to make everything new. They way you interact with the game should not be the same as D2, like: level the same, farm for good items most of your time, pvp the same. You need to make stuff like that new. The PvP would be the most important one. I don't think they should make it like "Acts", more like WoW, with a world map.
I just want them to focus on adding more content to everything, no just npc deaths.