It's really sad that Blizzard has no idea what makes D2 a great game, especially considering they just released D2R so we can relive the glory for ourselves. D4 on release was nowhere close to D2, it was more like a toddler trying to make an MMO.
In D2, you can feel your character become more powerful with levels alone. In fact, gearing basically doesn't matter for most of normal difficulty, it's almost entirely level focused. D4 scales content to your players level, meaning every level you gained made you weaker. No shit people didn't want to go for a long XP grind, who wants to continually grind to do less damage?