If the health falls to 400 (which means 200 protection remains), there will be a 50% chance of passing the controls.
No, right there...
The whole point was to remove RNG on CC and debilitating effects, which is the most frustrating RNG there was in first game.
What SHOULD be done instead a good portion of all incoming damage going to vitality regardless of armor, so that mixed teams are not in disadvantage and you don't have these silly cases where something with 10 vitality remaining can shrug off Meteor Storm just because it has stacked Magic Armor.
But armor protecting against CC and debuffs should remain as is.