Im not sure it is good idea to introduce more crowd control into the game, especially in form of a new “class” that sole purpose is control magic.
NRFTW is known for challenging combat, adding class with crowd control toolset would be impossible to balance. It is very easy way to trivialize combat and enemy’s special attacks. Some enemies have a very scary attacks, like a wolf can jump on you and bite you to the death, or this thing that is burrowed in ground can catch your legs and smash you to the death. It would be really sad if players got easy way out of those.
I don’t mind adding another element, but it should have different enough play style and mechanics and not trivialize combat.