Since it's unlikely that the armor system itself will be changed at this point, my main thought toward this is that CC abilities might have a partial effect if the armor value is below a certain threshold (scaling by level). If the usual effect is reduced by one step (Stun becomes Shocked, etc) and only lasts a round, those effects would still be helpful, especially against enemies that have lopsided defenses.
Even if we do that, it doesn't help the real core issue.
There's only one playstyle in the game right now, "Number rush". Even if low-rank CC still work, people won't bother with those because skill that inflict those CC are not compatible with the direction of the combat unless they also deal massive damage.
We need to introduce more playstyle to the game especially when you consider that this is a turn-base game with no execution skill required.
This is the core issue with the game right now, even more than the armor system itself.
