Core barbarian: half-orc, level 20, Strength 18 + 2 racial + 5 levels + 6 belt + 1 manual + 8 raging = Str 40, full power attack, vicious +5 greataxe, full attack action = four attacks against the adamantine wall for an average of 79 damage per hit = 316 damage to the wall, -60 points for the adamantine's hardness, so 256 damage.
Warblade: half-orc, level 20, Strength 18 + 2 racial + 5 levels + 6 belt + 1 manual = Str 32, full power attack, vicious +5 greataxe, weapon specialization, Strike of Perfect Clarity = one attack against the adamantine wall for an average of 175 damage to the adamantine wall, -20 for the hardness, so 155 damage.
I am failing to see how the core-only half-orc barbarian is anything but
superior to the warblade at chopping through adamantine walls in 1 round. Of course I don't have the book on hand so I can't factor in whatever Boost the warblade might add in, but it's not likely to make up the difference of 101 damage. Though I'm forgetting if the warblade would also get greater weapon specialization, which is a pittance of extra damage by comparison.
Sure, the Warblade could potentially chop it apart in one hit compared to the barbarian's 3 hits (the 4th is really unnecessary), but it would be a difference of about 1-2 seconds in D&D combat times (Warblade chops through with a strike in 3-1/2 seconds of focusing and making a single attack, Barbarian chops through in 5 seconds with a rapid series of 3 attacks).
And, really, there are only a few disciplines that are really magical in their results. Some of the maneuvers from Diamond Mind, Iron Heart, Stone Dragon, Tiger Claw, and White Raven might be supernatural or the like, but most of them are not, IIRC, and few if any would even
appear supernatural to an observer. Although, Tiger Claw has a few that are definitely unusual, but no biggie, they don't have to learn the few really unusual TC maneuvers and stances. Devoted Spirit for a Crusader makes perfect sense with its divinely-granted mystical effects, it's just like a variant of the Paladin, using moments of divine inspiration and brief surges of divine power rather than spells.
And as mentioned, the core Monk and suchlike already present similar supernatural martial arts stuff in D&D. It seems like most folks who dislike the Bo9S from a flavor or style standpoint just don't like any kind of non-European influence in D&D, and are monk-haters already as a result. I can understand not liking the added complexity of manuevers, though it's really just giving warriors something fun to do besides full-attack or spring attack. But I can't fathom the rabid Eurocentrism that some people have regarding D&D. Even Greyhawk itself has some notable Middle Eastern influence in its setting, by way of the Baklunish people, their nations, and some aspects of their faith.
Also, the brokenness of a few maneuvers does not make the whole book broken; sure White Raven can be broken, and a few maneuvers from other disciplines perhaps, but so can some of the spells in the core rules. Really, core spells are more likely to cause problems with a DM's campaign/adventure design (Scry/Buff/Teleport anyone?) than martial maneuvers will; the maneuvers are almost exclusively combat effects, barring a few Shadow Hand maneuvers and some others, many of which aren't even normally available to Crusaders or Warblades.
And regarding things maneuvers can do that spells cannot: like what? A wizard's Time Stop is generally as much or more effective than a 17th-level Swordsage or Warblade using Time Stands Still, depending on what the wizard does with his bundle of extra turns. And unlike the wizard, the swordsage or warblade is just attacking really quickly in a series of rapid hits, not even special hits, just flailing away rapidly; not actually stopping time to unleash a barrage.
And an aside: Who doesn't like
Final Fantasy?!?! I'll kick your butts for that!!!
j/k