ToME: the Tales of Maj'Eyal

I just spoke nicley to the Assassin Lord in the Unknown TUnnels, and he gave me my poison unlocks. Nice guy.
Thought I'd talk to him again and he repeated the same options. So killed him and got his drops, altough no updated quest text.
Is this intentional? If so, can we make post-unlock dialogs reflect the fact you allied with him initially and then turned into a traitor?

I think you should be moved straight to the world map if you side with him.

I like the way you can agree to help and then backstab people in the game. I do it all the time in the Hidden Compound, for example. I was kind of bummed when I couldn't betray the Grand Corruptor