In my opinion they took too much of the choice out of leveling up. I like how in D2 i could spend my strength, dexterity, etc points. Then there were also different skill trees, and within those trees were different specs (IE, frozen orb sorc vs blizz sorc etc). With this game, you really doint "customize" your character, you grind until you unlock everything. On D2 i had so many characters and spent so much time because I had multiples of the same character but different specs.