Adaptive Style is rather poor for a Warblade; you can't prepare much less than what you know. Steady Concentration is worthwhile if you intend on a lot of Diamond Mind. Being able to take 10 on your saves and damage rolls is all good. And I definitely think you have the right class build; do consider that 1-level Barbarian-dip to get Pounce though as being able to Pounce with maneuvers such as Bounding Assault and Battle Leader's Charge is very awesome and definitely superior to having Pounce with just Pouncing Charge. The other dip-option is Monk, taking the Decisive Strike-variant to buff your AoO damage (although it has the "if").
I assume you aren't interested in the Deformity/Deformity: Tall-plan? It boosts your reach, but is really eww roleplaying wise (well, deformity in general). I'd still consider Shock Trooper even if you aren't specifically a Charger. That said, Improved Trip is also fine as a damaging alternative to Stand Still when possible, as is Combat Expertise > Karmic Strike (requires extra Int & Dodge-variant though, so it's expensive). Since you're two-handing, Improved Buckler Defense is considerable. Also, Deft Opportunist for +4 on your AoOs isn't bad; makes it easier to keep people still.
Since you have Mage Slayer, consider Pierce Magical Protection and Blind-Fight > Pierce Magical Concealment. Concealment means no AoOs so the latter is definitely awesome and the former could be useful to penetrate the defenses of a given heavily buffed caster. You could get Blind-Fight as a Warblade bonus feat later on to avoid the associated costs.