EEAAOBB was made to fill a niche gap in Minecraft; it checks all the boxes of places to explore, places to go, items to chase, things to build, and a lot more.
The primary mods included are The Undergarden, The Twilight Forrest, the Create mod and a few add ons for Create, along with a number of Yung's Better improvements. To round everything out, there are quality of life changes for things like storage, sleeping, crafting, and a few others.