I have really enjoyed Arcs by Cole Wehrle as my modern Diplomacy-like asymmetrical war game - cutthroat, negotiating, area control, but also more randomness, variety and theme. And the campaign totally changes the vibe into a space opera!
Root was also very good but I think is harder to master as the factions are so different and so runaway games are common IMO.
Root was also very good but I think is harder to master as the factions are so different and so runaway games are common IMO.