My commitment is to getting fundamental reform — the Citizen Equality Act of 2017 — passed, not implemented. Of course there would be significant work to implement it, but not the work you’re imagining. The FairVote proposal is federal; it doesn’t involve state by state redistricting.
And the three parts of the CEA together wouldn’t just represent one set of “a hundred or a thousand issues that are important, and frustratingly unfair, stupid, or harmful.” They would be the kind of fundamental change — achieving (finally) a representative democracy — that would make “a hundred or a thousand issues that are important, and frustratingly unfair, stupid, or harmful” easier to address. Not immediately, obviously. But the work to achieve a representative system will have been begun.