Good to hear some figures about the drop in bot editing because of the intrawiki links. I've recent taken over maintaining one of
our more venerable stats on Wikipedia, and I was looking for a figure on the drop in editing due to the intrawiki change.
Anecdotally I was told that the Wikidata community was half existing wikimedians moving to a new project and half new recruits to the community. But I don't remember seeing detailed stats on that, it might make an interesting Phd project for someone.. As with so many other spinoffs both within the community to Wikitonary, various languages of Wikipedia and of course Wikimedia Commons and to fansites in Wikia of course there will be some loss to the community they were spunoff from.
The other, bigger and harder change to quantify is the amount of vandalfighting, bot and manual that moved to the edit filters between 2009 and 2014. Because it was a gradual process as filters were tested and refined it mainly looks like a general decline in editing.