CapnZapp
Legend
At first, I thought you merely agreed to the "unplayable" sentiment going around.HotDQ is bad in pretty much every way. MiBG is good in a lot of ways, but bad in the only way that really matters (the players wanting to play again after the first session).
Then I noticed: first session? Unless you run marathon sessions, your players can't yet have been dissatisfied about the bhaalspawn angle leading nowhere, yes?
Do you mean to say your players walked away already after the initial murder? Could it be that you mean your players didn't like the way you can't save the Duke no matter what?
Regards,
Zapp