These are excellent, great work. Small note, the Austro-Hungarian agreement with Ukraine for grain was that East Galicia and Bukovina would be combined as a Ukranian-majority crownland of Cisleithania, not be ceded to Ukraine. I see the later claim made on a lot of websites, it's not really supported when you look at the primary sources.
I would definitely recommend Fried's book. Obviously, it contains a lot of info on the subject, I'd call it a pretty comprehensive source. There's a lot in it, don't have it with me right now, but I remember for instance, a proposal to annex the strip of land Montenegro annexed after the Balkan War, or even the entirety of the former Sanjak of Novi Pazar, to cordon off Serbia from Montenegro. Probably would not have been very good at stifling nationalist sentiment, but interesting nonetheless.