[Neus]

Unfortunately this is unlikely for a few reasons. One would be that, it would cause a large work load for me, just to add contingencies for this sort of negation. Second, Black Knights are already a very strong class, so buffing them even more and potentially negating the effects of skills designed to somewhat counter their strengths wouldn't be a great idea.

As for the question of auto-hits, an icon is possible, but generally speaking all skills that deal damage are autohits. The only time accuracy factors in is with Mad Chop, which is noted in the skill description, and with skills that perform a 'basic attack' on an enemy.