As the game progresses I would expect the trend to continue of enemies getting better defenses. With that in mind, hard CC will start to be less of an issue from our side as well since only one or two enemies will be vulnerable to it at a time.
The real issue in my mind is whether or not bosses need something to aid them against CC. Currently I'm leaning towards not, but if they had a buff that made them immune to CC for one turn after getting CC'd I think that would be okay.
While the ability to CC everything in one or two turns should go away over time do to exponental increase defenses and linear increase in damage, it doesn't address the basic issues the armor system has in terms of making combat a resource management battle more than anything and the points I raised before concerning this.
While I can appreciate the point that being able to CC chain everything in one turn in group combat will/should be solved given enemy growth, that's not exactly the be all, end all of the issue concerning the armor system.