Morrowind was fun but the writing wasn't anything special. Plus that was like over a decade ago, Oblivion, FO3 and Skyrim were pretty men when it came to the main plots and writing overall. That said they are pretty competent at what they do, but what they do are rather simple, straightforward plots that are there for the player to follow if they feel like and add context/purpose to the setting but not get in the way of exploring and doing whatever they like in the big game world. They normally barely last 8-10 hours in otherwise 100 hour games. And it's not like much of that is actual dialogue or anything just the same old go here kill this, find this, etc. Not exactly deep stuff.
That's a far cry from writing a well paced, well thought out and emotional plot about finding your lost family or the even more complex story of discovering that you are not a real human being but an artificial construct meant to think you are and all the issues and existential questions that raises. I mean I think they're capable of using that within the world in other quest lines dealing with android NPCs but as a central plot device and secret core aspect of our player character, not so much.
If they pull it off I'll be more than happy, but right now their history and style of writing doesn't allow for any high hopes.
). 
