I don't know where to post this, so here it goes.
I believe there are three basic problems to Civilization IV BtS combat.
1) When I have engage in combat and I win, I have no idea what determines whether my unit loses some fighting strength afterwards or not. Id at least like some graphical representation of a units strength in men, not just fighting power.
2) I believe that the disparity between skill and technological power between modern units and ancient units is not represented properly. I mean, right now the only difference is in strength. In reality, modern units are better in both tactics, doctrine, and equipment.
3) For me, combat seems too simple. There arent enough rewards for being a good commander. There is no representation of flanking or intelligent combat manoeuvres. It seems as if its all about getting the highest strengthed units to destroy the enemys high strength units. And when your own units arent strong enough, you just bomb the enemys units to hell.
To solve the first problem:
I would like each unit to represent a certain amount of soldiers. For example, a current infantry unit model has three infantry men. Each other these models could represent 100 men. There could be a counter describing how many men were still in the unit. So if this infantry unit engages in combat, and is at 25% strength at the end of the battle, there will be a total of 75 guys out of 300 left.
This representation of men will also help my other two ideas.
To solve the second problem:
I believe that modern units should have an intrinsic advantage over early units (due to better weapons, tactics, leadership ect, etc).
For each technological step above another unit, the first unit will have a bonus 25% probability to win the battle. So a middle unit will have a bonus 25% probability of winning the battle.
An advanced unit will have a 50% probability of winning against an early unit. A Modern unit will have a 75% percent probability and so on.
You can represent this probability by the inferior unit (technologically inferior) losing 25% strength or something similar.
To solve the third problem:
Make so each unit faces left, right, up, or down. This will be the direction the unit is prepared to fight in. If attacked left or right of the faced direction, the unit is being flanked. It will lose 50% strength being attacked this way. If a unit is attacked from the rear, it will lose 75% of total strength.
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This is incomplete and open to debate. I will write more to better illustrate my idea, which I will post later.
Regards, Thomas