mvincent said:7) Sundering cleave feat description says "The additional attack is with the same weapon and at the same attack bonus as the attack that destroyed the weapon or shield" (implying that you could use successively lowered itereative attacks like normal... but that is not a strong point).
8) It has been established that you can strike (i.e. smash) inanimate objects with iterative attacks, but the rules say "Smashing an object is a lot like sundering a weapon or shield, except that your attack roll is opposed by the object’s AC."
I do not understand how either of these two are on topic.
The mechanics of how these are done within a character's turn says nothing about how they are done outside a character's turn (i.e. within an AoO).
Your first two points, on the other hand, are good points (although #6 is for D20 Modern).