I don't know if I will add that. I guess a workaround on this situation, is for you to find a way to add a state to the actors when they are with the low hp.
But, for the Normal, you mean Normal HP? For that you cannot use the default face of the actor?
As for the victory.. I don't see that to fit the plugin. Maybe you could call a common event to play at the end of the battle, that would change the actor faces?
Otherwise, in december I will be able to take a look at this.