I think the most likely recourse would end up being BLU's CC being gutted. Likely with similar limitations that their insta-kill abilities would get if it were to become a real job.
Since, adding in a bunch more CC's to other classes as well as overhauling the way that Diminishing Returns works, would likely have far more severe impacts to the game than we might initially think. Especially if such changes to DR end up affecting what CC gets applied to us. Not only in terms of enemies chain-CCing us to death (See: Fighting the Deathclaw Elite Hunt target as a class with only a single damage type) or being trivialized by chain-CC, but also massive implications for PvP content, where even with the current DR BLU would be pretty dumb in because of the sheer variety of CC's they have available (Petrify, Deep Freeze, Stun, Silence, Bind, Paralyze, Blind, Heavy etc) would allow them to chain-CC as is by just using different effects with different DR stacks.
Not only that, but in the practical sense of their CC, most of it is just a set up for their combo bonuses, after which it is removed. So it's not as if for gameplay reasons they are required to keep all of their CC intact, if there are alternative ways of allowing them the ability to set up their combos that would not rely on having to affect targets with CC.
Though, it's not as if they would need to lose all CC effects, or have them be all limited in use, just merely tuning down of various skills that would see a lot of common usage (For example, The Ram's Breath)
