Everything Sukuna has pulled off these last two chapters is thanks to some binding bows that either work in his favour or are not explained whatsoever. The author is just using binding bows to ignore everything that may have happened beforehand and jump to any development he wants.
This revision is really boring and uneventful, I don't understand why does it exist. It's beyond disappointing compared to the original chapters. At least Birdbrain is still alive.