Yeah, it seems like his big loss (and the big loss of many of the ToB guys) is the range. This is especially key for movement speed -- while the fighter is running around on his horse and the barbarian is, well, likely almost running as FAST as a horse (
), the Warblade is plodding along.
Also, often in rules comparisons, the ability to hit accurately is > the ability to hit for a lot of damage (see, for example, when people believe Power Attack is worth it vs. when it isn't). A d12 HD doesn't fully compensate for a mediocre AC, especially because it seems like these guys are going to be almost pure archer-fodder (or spellcaster-fodder).
They still seem REALLY powerful...perhaps still enough to overshadow the fighter or the barbarian. But it's still iffy, especially if a Fighter or Barbarian could gain access to these manuevers and stances fairly easily themselves.