We'll just have to disagree on that.
And I call BS on your example, I'm sorry, if only for one simple fact: Duriel. But any of the evils took more skill to beat in D2 than what D3 throws at you, and you actually had the chance to play the game a way other than what Blizzard dictated. Now? You're in the same skinner box just like everyone else. You can play it the way you want in D3 in normal as well (I suppose by deciding you're going to use nothing but the default melee swing?), but it's closer to deciding which weapon you want to slay a guy with, who happens to be unconscious, bound, gagged and poisoned. It really doesn't matter, you could beat him to death with a shoe, the end result is the same: he's going down with a minimum amount of fuss.
Or to put it another way, I don't remember beating Act Bosses and minibosses in less than 60 seconds in D2 normal. Yet that was how the majority of D3 played out for me. I remember nearly crapping myself in excitement when they first revealed the Siegebreaker Assault Beast....and it's laughable considering how he died like a total bitch in Normal in under a minute.
I also played the vast majority of D3 normal using two primary skills....my punch, and my finisher. Nothing else was required, and I probably didn't even need the finisher.
So yes, to me, Normal in D2 was a complete experience, in terms of gear, challenge and pacing. D3 it took almost 1.5 playthroughs to feel challenged, and by the time I'd hit Hell difficulty, I was so fucking sick of going through the same areas over and over again I could barely bring myself to play with friends. And the nickel and diming for health and damage upgrades, on top of the asshole Elite pack design and bosses whose damage skyrocketed, just kind of added insult to injury.