The warblade recovers maneuvers with a swift action, not a free action. Big difference, you only get one swift/turn, and it often gets used up by an immediate action the previous turn. Also, on the turn you recover, you can't use any maneuvers.
Also, the swordsage brings around twice as many maneuvers to a given fight, for way more options every round. And with Adaptive Style (a must), they essentially recover all of those options with a full round action.
Warblade maneuver recovery is far from needing fixed, and as some have said... Of the three classes, there's serious potential that the Warblade is the least powerful.