Honestly, I'd rather see a bare-bones Diplomacy system like currently exists, rather than a more complicated one that has all the limitations of virtually every other Diplomacy system I have yet to encounter. It's not great, but for an indie developer building a niche game, I'd rather see them work on trying to build out other parts of the game for now (e.g., enriching the "flavor" of different schools of magic, or providing more transparency in the UI).
I've been playing it for two weeks now, and I've got to say, I am REALLY impressed. What seems like a fairly simple game with a tough UI is turning out to be a delightfully nuanced game with layer after layer of complexity.
This gem is still in the process of being polished up, but the devs are continuing to release updates on a regular basis (e.g., every few weeks), and those updates consist of new content as well as bug fixes and balance tweaks.
This little gem is still being polished up, but for anybody who's a fan of the 4x genre, supporting this game should be a no-brainer.
With a more polished UI and a few tweaks to the AI, this one could be an all-time classic. As is, it's just a dang fine game for $25!!