Something which, i think, can be improved. Or if it's not, what a pity !
I think that M&B (and Brytenwalda, too) lack of interactions between NPC.
If it's a real RPG, i think it's normal to NPC to speak to each other, and not only to you.
For example, Baldur's gate became very famous not only it was a very good game, but also because there were great dialogs.
what could make Brytenwalda even greater would be to add this part. I don't know if the game allows it, but it would be great.
Of course, it's thousands of line to write, as there are many many characters, but it would be very fun and would diversify the game ...And perhaps some epic quests that you can only get if you have reached a level of confidence with one of your NPC, and some written romance.
This would help to make NPC more unique, too. For now, they are only stats and likes/dislikes.