The USSC is not going to bail out the state legislatures from their responsibility to fix this themselves. If they do not have the backbone to do it, does not mean the Supreme can force them to follow the prescribed path. They do not need someone else to force what they can already do.
Part of the problem may be the lack of influence the state legislatures have on the activities of their federal congressional delegations, now that members of the U.S. Senate are no longer appointed by them pursuant to the U.S. Constitution as written, but instead based on popular elections like members of the U.S. House of Representatives based on, what was it, the sixteenth amendment? If they retained this influence they could mount a concerted challenge to the formal Electoral College vote count that takes place during a joint session of Congress on January 6 every four years.