Not necessarily. If the Vitality is set to a point where they'll still be alive once the Protection is lost, and if the Protection is generally substantially lower than Vitality, enemies can still be worth CC'ing because they CAN'T be immediately killed as soon as Protection is gone. That will require tweaking and testing, but I think it's possible.
Additionally, keeping the split between Magical and Physical Protection and having them be different values, instead of mashed into one catchall Protection means that different CC's will be effective on different enemies.
What do you mean by "more acceptable", Zherot? In any case, your idea includes the same "percentage chance for status effect" which is exactly what the armor system in D:OS 2 was created to replace, so I'm not convinced that is the way to go.
