Pretty interesting data about peace time. About Empire kingdoms, yes, for some reason they are always at war and would be great if they would be in line with other kingdoms.
Hopefully people do not start complaining about “how much peace” we have now, and endless wars are not as common as before (some content for peace time is required tough). I think that having some peace times is great for gameplay, and while Vlandia and Aserai seems a bit too passive, Battania, Khuzait, and Sturgia look perfect to me. Would be great if Vlandia and Aserai would get more aggressive while empire kingdoms more passive, but I suppose that this is pretty hard to achieve.
Making peace declarations harder to trigger or to be accepted by clans could help with wars being too short and some kingdoms peace time being too long, but not sure if this would hurt too much snowballing. Anyway, while this looks really hard to be balanced, it is looking pretty promising in my view.