I don't necessarily agree. When building up your character, you still need to plan out your character according to the act you'll be facing. Honestly, DPS isn't everything. You need to pay attention to the attributes on each piece you buy, balance your stats, and make sure you can afford it. Not everyone has hundreds of millions of gold to buy the very best of each weapon. And even so, the highest DPS weapons sometimes don't even have great attributes.
D2 was also a lot of number crunching when you get into the high levels of PvP where you need to plan out exactly how you build and gear your character. For example, you need to make sure you meet all of the necessary character breakpoints of FHR/FCR/etc., while pushing at much DR and res possible. Then on top of that, depending on who you're PvPing, you've got to equip different weapons with different range for a more effective triangle WW or more FCR to stun lock a sorc while you're in a name lock.
At first, I thought Diablo 3 required absolutely no brains. Then I hit the gear checks of Inferno. Though there are cookie cutter builds for each class, you really can change it up and you've seen the success stories on the D3 forums. So basically, you CAN use the unorthodox builds and succeed, you just need to be creative with them and know how to balance your attributes and gear with your play style.
And P.S., otc, in Diablo 2, Hammerdins were probably the best PvE/MF/even PKers in the game. Once you hit that 125%FCR and learn how to name lock things with Enigma, hammers will never miss. You can clear all bosses so much quicker than any sorc. (I can't believe I still remember that fcr breakpoint...)