Warblade on its own is Tier 3. Owing to Iaijutsu Master not progressing maneuvers, the furthest I'd go in it is 5 to get Charisma on each IF die. The Canny Defense class feature will be useless to you because it's so much better to get even light armor for +3 AC. None of the other class features are dependent on not wearing armor, so wearing it will help you much more than it might hurt you. The 8th level ability to hit twice with a single standard action is made totally useless by maneuvers, and the 10th level ability to get an attack on the surprise round will be quite meaningless. The 9th level bonus feat will likewise be useless, or even worse than useless because there are better classes you could take instead such as fighter or warblade.
Keep in mind
Item Familiar normally requires the character to be at least 3rd level.
I take it "Improved Int" means Improved Initiative?
The
Blade Meditation feat normally can't be taken until 4th level. There is no "weapon meditation" feat. Also, it looks like you're thinking it counts as the Weapon Focus feat, but it does not. Were you planning on taking Weapon Focus (katana) at 6th level?
Warblades do not get a bonus feat at 1st level, nor is Iaijutsu Focus a class skill for them. How are you getting it as a class skill? And how are you getting +11 misc to Iaijutsu Focus?