The problem, in my opinion, is that at the end of the day it still comes down to modifiers. With games as moddable as these, the user will be able to know exactly what those modifiers are, by looking at some file.
Take Victoria II for example. In Victoria II generals have a background and a personality trait. You can see them and then you can see a list of exactly what it modifes. For example:
Background: Aristocrat
Personality: Chivalrous
+30% Morale
+2 Attack
If you remove the exact modifiers, you are left with two vage indications that tell you nothing. Even if the explanations are more detailed, let's be realistic, you'd just go to the game files or even esier, to the wiki, that you can access in-game, so you can exactly tell which of your generals has a higher attack stat so you can put him in charge of your mighty army.
Aye, I guess so - the issue is MP. In SP, I'm sure a lot of players would happily not look at the files and enjoy the more historically plausible gameplay, but in MP people would be shooting themselves in the foot not to.
The only alternative would be to keep the actual modifier in-engine, but that'd hurt moddability, which I wouldn't be a fan of.
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