I believe very strongly that a few of the blademaster skills/mals need to be looked at and toned slightly.
Shadowdancer is very strong when coupled with a particular race. The effects of having strength and dex so high is more than just added hit/dam to say the very least. I will admit that this is not particularly what I see in them as issue provoking as it really only exhibits strength in one combination.
[i will keep these as vague as possible for those who do not know what they do]
Spellbane: If it is critical to keep this in the game, I would like to see it be more reasonable. I believe that a modifier of -10 maximum, but more realistically -5 should be employed.
Deathweaver: Don't be deceived by this skill. It, like spellbane, completely dismantles a certain class and tends to, along with the combination of their other skills, make the fight nothing short of futile.
I believe that blademaster stances and skills should provide an advantage. However, I do not believe in any skill/spell or combination thereof that makes someone elses character nearly useless. That is the definition of unbalance.
They have mastery in your anatomy? Yes, the fight should be challenging, but should not constitute a single skill domination. I only fear what monks would be like if they had such insane anatomy based advantages.
They have a skill that is capable of helping against multiple attacks? Okay, make it an advantage, not a crushing skill that negates the entire opposing class.
Fighting the blademaster class is like kicking a big, spiked rock. Have no confusion, I like that part of it and find it to be their place. They are very hard to kill as they can counter nearly everything thrown at them. I do wish, however, that serious thought is put into some of the affects they can put on people. These things coupled with their already impressive skill set can create unbalanced(I mean this as not a simple advantage) scenarios.