Personally I believe some more strange bench law is about to be written. Like we can't get involved in a state election even though it impacts military voters because it is only a state election. Also disenfranchising voters is not a federal issue unless it involves an election a nationwide office. So it will be up to states to police themselves. Regardless of the outcome of this particular case, I predict that Congress will enact some laws regarding federal elections that lay down some unambiguous deadlines. Otherwise this issue will be revisited again and again.
Congress won't enact squat in this regard if the Dems have anything to say about it.