Peter BOSCO'S
Adventurer
Well, back in the day PC's were likely to try to rob the store, so it was really a dungeon and it therefore needed a map. Conversely, they weren't going to talk to the Castellan, they were going to kill him after they killed all his soldiers, after their robbery of the store was interrupted. [Source - I played back in the day....]"You don't need to know the castellan's name, but you 100% need a map of the general store" is ... idiosyncratic.
It'll be interesting to see how much of B2, Return to Keep on the Borderlands and the Borderlands novel show up in this boxed set.