eh... a banker certainly have a lot more info about a specific region than a lord, in bt at least.
it's not so much more data... just more detailed in how it breaks everything down
take the banker's food page.. it tells you how much food there is, how much will probably be consumed, how much needed before next harvest, projection into the next harvest, etc.
there's basically no equivalent for a lord. i'm not saying a lord should have details for any of the other regions... but just the same sort of info on his own region would be nice.
all a lord has is the age old produced/consumed/"surplus"/stored in warehouse.php