Well, the OP hasn't posted for a long time and currently I don't even know who are in the team or who's the project leader so this is
I would like to iterate some suggestions I gave before.
While I am not in charge or even in the project team I would like this project to just enlarge vanilla Skyrim.Which means
--->Enalarging the landscape to the required scale.
--->Repositioning/scaling of all exisiting objects to their relative distances and places.
--->Compensating for scaling by re-texutring the landscape in required areas.
--->fix quests and all the small stuff.
What I don't want this project to do inorder to compensate for scaling
--->Rebuild holds. This means no addition of houses, npcs etc.
---------->But this doesn't mean one cannot re-position or scale existing holds/buildings so they fit in.
--->Rebuild the Bioshphere. i.e. add more trees, more animals/birds etc.
--------->This doesn't mean one cannot reposition spawning points, positions of existing trees etc. They may and will in most cases look wierd but the exisiting objects will be used to just kind of define the boundries of the feature that exists in the location.
Regarding the don'ts.
I said what I said because I want this project to focus on the very basic stuff and act as a blank slate for other modders as well as for other goals of the current project. But first I want the groundwork to be finished so that we can present it to everyone and say -" Here is our work. Help us make it better".
Well this is just my opinion.