You are not the first to over this kind of 'successrate' depends on the state of armor. You made it further by reducing the base chance aswell. But as I mentioned, the community is very devided at this topic, because of many detest any kind of RNG. (Wich kind of would mean to remove as whole aswell, in the end it is RNG aswell.)
I personally find it more appealing like the current: CC yes or no bullshit, but it does not look, like Larian is consindering any change. I still miss body building and willpower, because increasing those gave you a better feeling of have gotten stronger.