They could start with the Corsair Prince, and not make him ~50% more expensive than an Autarch and worse in every conceivable way. That and the Void Dreamer needs a complete overhaul. Other than those though, mostly I'd say it's just updating the wargear profiles to be in line with the main book, and tweaking the points.
Try using the "oh btw its Night fighting now" in an apocalypse game and you'll be thinking that he's the best deal ever :P
I have never made but one prayer to God, a very short one: "O Lord make my enemies ridiculous." And God granted it. --Voltaire