Dragon Age - Witch Hunt Issues, Review

Apparently the Witch Hunt DLC has a "continuity bug", which means Morrigan doesn't respond to some players properly with their choices from DA:O.  As you can imagine, a DLC specifically about your relationship with Morrigan is rather broken if it doesn't even recognise that relationship.  From the official forums:

Hi everyone,
Thank you to everyone who has downloaded the Witch Hunt DLC pack.  As everyone here knows, Dragon Age: Origins is a huge game with a lot of choices for each individual player. Unfortunately, there is a continuity bug that is causing issues with a subset of our player base.  While this issue is not affecting the majority of people, it is still a significant issue that we will address. We apologize for any inconvenience this may be causing anyone.

Clearly, it was our responsibility to catch this sort of issue in the interaction of Witch Hunt with Dragon Age: Origins.
Our team is doing everything we can to fix this in a timely manner so those who are affected can go back to enjoying Witch Hunt as soon as possible. 

Stay tuned here for an update soon and thank you for your continued support.
Thanks,
Mark Darrah
Executive Producer

...and they're taking applications to test the patch here.

Meanwhile, Joystiq has a pretty negative review:

If you're importing your Grey Warden into Witch Hunt (the game will import a level 20 replacement from Orlais, otherwise), you'll be eager to see the consequences of decisions you made in the Origins campaign. Witch Hunt acknowledges these and even some from the Awakening expansion, but addresses the big questions so vaguely that it feels like the game's just trying to dodge the conversation. If you were hunting Morrigan for answers, you'll find she's about as enlightening as the fan discussion on the official BioWare forums.

It wouldn't feel like such a trick if there was more effort evident throughout the add-on. In your quest to locate Morrigan and a mysterious mirror, you'll battle through several locations, each and every one recycled from the main game or earlier DLC. An encounter with a frightening new creature was blunted by the reminder that I had fought a boss in the exact same spot before, in Dragon Age: Origins - Awakening. Somebody should put up a warning sign or something -- Caution: Boss Fight Zone.