HI Dalton,
Regarding the collection of data for a system.
As again, BtC is an official book, it can only include the material in that book.
I know for example, it contains a small section on Marduk, a system that is explained in much greater detail in other official products.
You can if you wished, drag a system/world and make a local copy. Edit that to include whatever content you want, and use that in your games. You could even export your systems/worlds as a module to include in all your games.
Cheers,
MBM