How about giving all factions (except Sturgia) a morale loss (both party morale and the morale in battle) in cold weather? There is dynamic weather in the game but it has no use other than visuals. Armies in the past had to abandon sieges and had to end campaigns due to weather conditions. This can give Sturgians an advantage. They already move less slowly on snowy regions (I don't know if it is implemented yet) so it would make sense for the faction.
I think that weather, terrain corelated, sieges with a movement type (on foot or mounted) or generally enviroment related buffs may add variety and interesting behaviours and hopefully help balance the game.
My proposal:
Environmental:
Sturgia:
Advantages:
+2 to fighting on the snow, +2 to movement on the snow, +1 to forest fighting, +1 forest movement, +1 to fighting in the mountains, +1 to movment in the mountains,
Disadvantages:
-2 to figthing on the desert, -2 to movement on the desert, -1 to fighting on the steppe, -1 to movement on the steppe
Neutral:
Fighting and Moving through plains
Battania
Advantages:
+2 to forest fighting, +2 forest movement, +2 to fighting in the mountains, +2 to movment in the mountains, +1 to fighting on the snow, +1 to movement on the snow,
+1 to movement in the plains, +1 to fighting on the plains
Disadvantages:
-2 to figthing on the desert, -2 to movement on the desert, -1 to fighting on the steppe (
explanation: they are not used to fight in the vast landscapes having only horizon on sight..), -1 to movement on the steppe (
explanation: no single tree ? where are we ? )
Neutral:
Battanians are well known extremists. No neutral behaviours.
Vlandia (Pretty much jack of all trades type of nation)
Advantages:
+1 to movement in the plains, +1 to fighting on the plains
Disadvantages:
-1 to figthing on the desert, -1 to movement on the desert,
Neutral:
All other.
Empire
Advantages:
+2.5 to movement in the plains, +2.5 to fighting on the plains (
Their are disciplined infantry based nation imho - must have somehow conquered all this land)
Disadvantages:
-0.5 to figthing in the mountains, -0.5 to movement in the mountains, -0.5 to fighting on the steppe, -0.5 to movement on the steppe, -0.5 to figthing on the desert, -0.5 to movement on the desert,
Neutral:
All other - forests and snow are neutral to them, as they learned to deal with both through conquest.
Khuzait
Environmental Advantages:
+2.5 to movement in the steppes, +2.5 to fighting on the steppes, +1.5 to movement in the plains, +1.5 to fighting on the plains, +1.0 to movement on the desert, +1.0 to fighting on the desert
Environmental Disadvantages:
-1 to fighting on the snow, -1 to movement on the snow, -1.5 to forest fighting, -1.5 forest movement, -2 to movement in the mountains, -2 to fighting in the mountains,
Neutral:
None
Aserai
Environmental Advantages:
+2 to figthing on the desert, +2 to movement on the desert, +1 to fighting on the steppe, +1 to movement on the steppe
Environmental Disadvantages:
-2 to fighting on the snow, -2 to movement on the snow, -1.5 to forest fighting, -1.5 forest movement,
Neutral:
Fighting and moving on the planes.
They also don't care what type of mountains they are travelling through.
Sieges:
Offensive sieges:
- Preffered nations: Sturgia, Vlandia
- Not preffered nations:
Khuzait, let us not cripple them to much, Aserai instead
Devensive sieges:
- Preffered: Vlandia, Empire, Sturgia
- Not preffered: Khuzait
Battania neutral for both types
-----------------------------------------------------------------------------------------------------------------------
You can always adjust those numbers. The question is how applicable this would be to the code..
P.S. I believe i see trade as the one which might also be affected.