I ran this adventure at Gen Con and played it once as well. Both sessions were 4 hours, so we didn't do the bonus objectives.

The key reasons I rated it with only 2 stars:

• The situation in Myth Nantar is unclear. There's a reference to sahuagin raids, a sahuagin "occupation" and even sahuagin on the council. A more precise description of the sitaution would have been welcome. Though given the way the adventure is written, it hardly matters.
• There are the pieces for an interesting murder mystery, but the PCs can't actually solve it. The adventure seems to assume the players will investigate, not find anything, and then eventually give up and head to the temple. I would have preferred if the adventure either paid off the investigation or removed it.
• The main villain in the adventure has impenetrable plot armor, which I and the players found frustrating. I'm not sure why this is the case, because while the malenti shows up in DRW-03 they aren't a critical piece of the plot.
• I think the adventure is set up for the PCs to be far too dependent upon NPCs. The players could too easily feel they are simply Zehira's hired muscle. And if there is no elf in the party, the characters are forced into accepting Thessalia's help.
• Communing with the Librarian had the potential to be a memorable scene, but instead the PCs are likley going to be cooling their heels while Thessalia does it. This is another missed opportunity.

I was able to solve most of those problems for my run-through, but I shouldn't have had to. With so much great AL content available, I can't really recommend this one.