...the safeguard is the people will have to approve them before they take effect. Not true. They will take effect immediately, in the same election that is requesting approval. If turned down, they will be revised prospectively only. Check the fine print. It's there in black and white.
In that case, its hard to see how one can justify any election. The one good thing about taking redistricting out of the hands of politicians is to take it out of smoke-filled backrooms and open it up to public debate. At least the supporters of new lines will have to justify them. It would be a good thing too, to have districts drawn on the basis of rational interests rather than what's good for politicians. The measure is supposed to preclude taking partisan data into account. In the final analysis, we can only evaluate the judges' handiwork by comparison it to the work product legislators did earlier. Whether it makes the good government types happier remains to be seen.
(Denny Crane: "Sometimes you can only look for answers from God and failing that... and Fox News".)