While this solution seems obvious, I highly doub that it will be one for the Amon problem. For him it's not just the council which is opressing non-benders, it's every bender and he will not stop just because he gets some representation. And the way I see it, it's the same with many of his supporters.
I mean they'll arrest Amon and his followers, then put non-benders on the council to calm down the less radical Equalists so that their numbers shrink to something more manageable instead of a revolutionary threat.