I just pick up my PHB if in doubt. But yeah, for newer players it might be a good idea. On the other hand it could be a bit intimidating for some, so I understand why Larian might not want to. An encyclopedia, or menu accesible from the main menu, might not be a bad shout though, post release.

"They say he who smelt it dealt it."
Sooo technically... this burnt corpse is your fault officer."