Redistricting won't save democracy; at best, algorithmic or "mathematical" (a fool's term for neutral and objective) redistricting will allow for the voters to pick candidates that are proportionally and geographically anchored to their districts. Geographical picking of representatives isn't broken beyond repair within the political system, nor is the physical counting of votes to determine which representatives win, though the electronic voting systems leave the latter terrifyingly unverifiable and unquestionably anti-democratic.
The slaughter of democracy in our time is an intentionally engineered result of post-election corruption as effected by bribes of lobbyists, raping the power of the vote in the name of capital flow to those that are already morbidly obese with riches. You cannot have democracy when money is allowed to have a coercive power that eclipses any feasible democratic comeuppance.
Let the banishment of money from the election component of political activity exist as an iron law in any new democracy which is established. That would be the start of having a fighting chance for democracy, which America has long since discarded.