Moneybags14 will be working on the unit statgen spreadsheet, doing it all manually frankly takes ages and its very easy to make mistakes.
Remember the Guide is only a part of the story, there have been many, many updates to other files such as mounts, projectiles (eg accuracy updates for different weapons employed in different ways, updated projectile types and racial accuracy effects) and especially to many animations, which combine with updates such as the new cavalry types and stats to make each unit's behaviour and capabilities much more distinctive than before. Other examples would be how cut-and-thrust swords have different animations, stats, attack speeds and space required to use than pure cutting/hacking weapons, and a new morale and mental stats system.
These changes work to further emphasise the differences between races, unit types and skill levels, along with such additions as the new weapon/missile/armor/shield quality modifiers, which stack with racial modifiers to very much make units such as Eldar extremely formidable.