Apart from having manuals for 20% of all the mods, it now also has a tool which allows you to inspect special units! It also has gotten a major UI overhaul to make it all look nicer.
But I'm not done... The Essentials mod will be the start of something that Warzone hasn't seen before, but more about that later. For now, enjoy the new update of Essentials :)
(PS: If you were not using the Essentials mod in your games yet, do it! It only gives documentation and tools to help you to play with the other mods better)