ToB:B9S had such wonderful, inclusive flavor that I honestly think they could split up the different schools per class.
In fact, this is one thing that bugged me about the book. It really allowed the three Martial Adept classes to fill any role they wanted by choosing the appropriate school to specialize in.
It didn't seem fair that a Martial Adept could act like a Rogue/Assassin with Shadow Hand techniques, a Monk by using Setting Sun, a Dwarven Defender by choosing Stone Dragon, a Bard by choosing White Raven, etc...
Instead, I like the idea of certain classes getting access to these types of "School" techniques right off the bat without having to dip into a "Splat Book".
i.e. All Rogues get abilities like Shadow Hand techniques, All Monks get Setting Sun throws/counters, all Dual Wielding Rangers get Tiger Claw abilities, all Bards/Warlords get White Raven inspirations, etc...
In a way, this "spreads the love", and lets each class perform their chosen niche while performing the "cool" and entertaining abilities that Bo9S offers.
i.e. I'm a trap springer/lock picker that can shadow jump, I'm a dual wielding nature warrior that can rend like a gorilla, I'm an unarmed brawler that can counter your own attacks before you land them, I'm a heavily armored tank that can adopt the toughness of adamantium, I'm a charismatic entertainer that can inspire my friends to heroic acts of valor, etc...
For those that liked the Swordsages adaptability, I suppose this is where the cross-class "Feat" swapping comes in. You could be a primary "Savage Nature Warrior" who takes a few Rogue abilities to Shadow Jump, you could be a "Heavily Armored Tank" that can also inspire his friends just a bit, or an "Unarmed Brawler" that can rend like a wild animal.