So if you like the warblade to represent the fighter (which I happen too) the 4e fighter is likely a much better fit for you than the 3e fighter.
You misunderstand me. I liked the warblade not only for its mechanics (which I concur that 4e replicates quite well), but also for the way it interacts with other classes.
You weren't limited to just a pure warblade (viable a career path as it may be). You could go wild with multiclassing possibilities, such as...
1) warblade3/crusader1/swordsage1/shadow sun ninjaX
2) monk2/swashbuckler3/warblade7/eternal blade8
3) warblade11/monk2/swordsage2/master of nine5
4) splash other class lvs for additional features like more feats etc.
5) factotum/warblade multiclass
6) warblade/swordsage multiclass (which has a lot of possible permutations, depending on how many of each you want to take).
The list goes on and on, restricted only by your own imagination (and well, your access to splatbooks)

. To me, 3e was like playing with lego bricks. The sky was literally the limit when it came to what you could construct. But 4e? More like playing action-figure dressup. You already come with the preconstructed GI-JOE action figure (in 4e terms, the basic class template). All that is really left is to decide what sort of accessories you want to outfit him with. Do you go with the rocket launcher or the rifle? The parachute or the inflatable dinghy? I can design a million different weapons for you to choose from, and while your choices give you room for minor variations here and there, ultimately, it is still the same figure to me.
Every edition of D&D before 3e would disagree with you.
-O
Had 3e not existed, I would be inclined to agree that 4e would be massive improvement. But I felt that 3e really raised the bar when it came to reinventing dnd. It not only adequately ported the "feel" and "essence" of previous editions over, but added new options, and lots of them. To the extent that 3e should in turn become the new gold standard with which future revisions ought to be gauged against, not 1e or 2e (revolutionary as they may be). 3e gave us
options.
4e seemed more of a step back in the wrong direction, IMO. Peel away the flashy names/terminology and what are we left with? 2.5e? The 1 class from start to finish rule was a bug, not a feature. 3e multiclassing freed us from the tyrannous yoke of this limitation. 4e multiclassing....um...
Had it been marketed under a different name, I would probably have been happy to just pick up a new system to learn. But to classify it as dnd...