Since Annie's attributes are being changed every turn (potentially), a reminder needs to be placed on her attribute. Add this the end of her Heroic Ability:
"Place your hero token on the chosen attribute as a reminder."
Her Heroic Feat could (should?) be related to her Hero Ability, in my opinion. One potential option could be:
"Choose a hero in your line of sight that has failed an attribute test. You may perform the attribute test again instead of the chosen hero. Game effects from the test remain with the chosen hero."
As mentioned, since his Heroic Feat could be potentially game-breaking, adding a restriction would be appropriate:
"for each other hero within 3 spaces of you" solves this problem. Alternatively, "for each other hero in your line of sight" could also be appropriate.
This one is more of a personal preference of mine as the rules specifically state that when you perform a stand up action, your turn immediately ends. In my custom classes I add this verbiage so as to reduce ambiguity (even though the ability modifies the stated rules):
"When you perform a stand up action your turn does not immediately end and …"
I'm not really a big fan of his Heroic Ability. As a Warrior archetype and keeping theme in mind, I would recommend either a defensive or offense Heroic Feat. A couple proposals for you to consider:
"Use this card when you are defeated. While you are knocked out, each hero adjacent to you adds one black die to his defense pool." (I chose a black die instead of gray as it is his default defense die) or,
"Use this card when you are defeated and roll two red power dice. Each monster within two spaces of you suffers Ht equal to the Ht rolled." (I chose two spaces instead of three to account for monsters within melee attack range only).
Just my thoughts for your consideration.