Seems like a great idea to me.
Im all for softer effects rather then hard barriers and penalties.
A couple of suggestions about some details of it:
Frozen should not damage enemies close by but apply a small measure of slow down, reduce movement speed for them too, if they are very close. Lasting a turn if they move away.
Fear should not give damage either.
Charm should not give damage either.
Those are not meant to be direct damage skills or effects and we have plenty of damage dealing skills anyway.
I like charms as it is. Its an effect that can be a great help or great hindrance requiring turning it back as soon as you can manage. I would only add some lesser debilitating effect to it after it wears off or gets turned back, so the affected character or enemy wouldnt be up to 100% efficiency right away. Something like reduced precision and dodge for a turn after Charm wears off.
Im not sure if Fear needs to be changed either or in what way, it seems simple enough as it is.
Maybe adding the "drop weapon" effect similar to "disarm" that is now in the game would be a good addition...
Or just disarm, which forces the enemy (or you) to re-equip the weapon once the fear wears off.
I guess you can see my suggestions about making new magic and physical armors work based on percentages, rather then hard barriers, so ... it would be nice if someone could mod it, in case devs dont see the brilliance of my idea.
I think ideas for Stun and Knockdown are very good. I would maybe add losing a few APs for the next turn when standing up from knockdown because standing up wastes a few APs itself.
