Nah, I can name at least 5 horrible things that is inexcusable. And please, some of those characters have lost people they loved more than Sue and were able to think clearly enough to beat up the villain in their story.
For example, no matter how angry Wally is, doesn't mean he can't see the sword. It would be impossible for the sword to touch him let alone go through him. And Kyle would have used his anger by creating a wrecking ball or just putting Slade in a complex contraption (wrapped in chains, in a coffin, in a box).
Such a bad comic series. I love Slade but there is a reason why him fighting Batman is an awesome fight, not the whole JL with "prep" that any villain could make (nothing complicated like traps, beams, etc..).