Malte,
I'll see if I can -- not sure how to handle some of these items -- looks to me that one would have to run a few scripts from the files system at first, to get some of the stuff in. Otherwise we may need to add additional hooks kind of like run_once_on_update_only that would check if we maybe doing an upgrade, and then bootstrapping all of the missing data/proc/etc.
The above crUfting is not good for real upgrade, I suppose, but I will see what I can do. If anything, it may at least be a "field trip report" :)
