I always thought of 3.0 as having the most Open Architecture. The most possible Player Choice. The most nasty and villainously vile min/max combos to give headaches to DMs with.
So, they sorta went back to an OD&D type approach, did they? A simplified system like OD&D, where options are limited?
(considers that)
EDIT: It sounds like a situation where I - if I were DMing - would combine 3E and 4E. Use 4E as the base, and pile 3E on top of it. (Sort of a variant of what we did historically with the restrictive rules of OD&D)
EDIT: Example:
At first, elves had to be fighter/mages.
Then, with 1E, elves could be multi-classed (a lot of things) but had level limits.
Then, with early 2E, elves could be multi-classed, with more classes open to them and higher level limits.
Then, with later 2E, elves could be multi-classed, in most classes with no level limits. And we had the bladesinger

And High Magic. And lots of elven goodness (and even more good drow goodness.)
Then, with 3E, we had elves who could be anything they wanted to be, plus Prestige Classes and whatnot, and have all the elven goodness you could talk the DM into letting you have (in one variant of the bladesinger, she could cast ANY arcane spells she wanted AND fight simultaneously AND wear armor AND ... lol)
And so on. Dwarves could only be fighters, then they could be really nasty fighters, then eventually they could be anything they wanted to be (eat your hearts out, elves!

)
Perhaps 4E will evolve like this?