I'm not sure, although it looks pretty good. Another good change might be Iron Guard, since Iron Heart's warblade-only and warblades already have Improved Uncanny Dodge.
Actually, Iron Guard provides a Foresight-esque effect. Uncanny Dodge only lets you retain Dex to AC while flat-footed, but it doesn't eliminate the condition. So Iron Guard just lets you use immediate actions before your first turn.
I agree that some of these are definitely weaker than others, though, so the prerequisites should make up for that.