I can't imagine an essentiallized no-daily barbarian being all that much different to the slayer
I actually can see them being quite different. They could still rage. It would start out once per day, go up to twice at level 5, and 3 times at level 9. There wouldn't be different rages, they would all do the same thing, whatever they decide that "thing" to be. If they want to go back to 2e/3e roots, it would be -X defense +Y damage. Armor would be light, speed would be faster, features would be less in the lines of boosts in accuracy and "always on" damage, but more in lines of boosts to charge damage, or some bonus feature that lets them make an attack when they take down an enemy.
More on topic, sadly, a subclass named "Hunter" just does not sound like a controller to me. It sounds like a striker. Perhaps, somewhat like the Predator Druid, it will sit on that blurred line between controller and striker.