Mimicking others.
But several things:
Customization rules for both drones and vehicles
New vehicles and drones focusing more towards Sec/Mil-Spec would be nice, especially for drones
Bio-drones
Mecha (more like the power-loader from Aliens or Walker gears from MGS5, not Gundams or Armored Cores)
Functional rigger rules (including how weapon mounts reload weapons), upgrading pilot, sensors, and other stats for drones/vehicles, and what do we use for STR for melee drones!
Autosofts, RCC, and other rigger tools
Drones and vehicle sizes and carrying capacities
Also, this needs to be more like Run and Gun, mostly crunch with some fluff, like the chapter stories and jackpoint comments. None of this majority of each chapter being fluff stuff, save that for the fluff books, please.
Also, functional table of contents, index, chapter headings, and please, please edit and double check that what is released makes since in terms of both rules and setting. No more pre-edited books that require full rewrites to be actually useful.