I finished the very last map needed for the graphical update last night. Phew, what a lot of work that turned out to be. Not the map itself, but the update in general. While I'm very pleased with the results, I will definitely not be doing it again.
The rest of the update isn't that time-consuming. I have to finish up converting script calls for Quest Log 2.0 (which is a handful of quests, so it's not too difficult) and play through the game to make sure that everything is in good shape. I'm also probably going to add a few more places where Alistair can interact with the environment (examining bookshelves, anyone?) and add more instances where personality/relationship levels are altered. This will, hopefully, only take a week.
So, from this point on, all you should see is new content. Hooray!