[Vodalian]

I think there should be an option to pre-assign your forces to not attack enemy forces, and if both sides had this activated, no combat would ensue. However, if only one side had this activated, there would be a battle as usual.
I think diplomacy on larger scale should not be implemented. It is actually very intriguing to not know what your neighbouring nations think of you, allowing you the freedom to discover their schemes through espionage and your clever thinking alone.