I was really disappointed to find that the Game Option to allow the Athena Ignorance to build replacements for us is totally bugged. I would never allow the dumb AI buy my replacements because I know it would buy the wrong mix of them and waste up to 15% of my resources doing so. I want to buy my own because I can see which things need replacing and I like to replace all of my losses each turn plus have a buffer for each item.
The problem is that if you change the option in the option menu it won't apply to the AI's if you then go back in and change it to another setting you prefer in the country you're playing. I thought that if I set it in the game option menu it would affect the AI's replacement buying after discovering they actually don't buy replacements. So after testing to see if I could get them buying replacements I found that in the nation I was playing if I set it back to buying no replacements after setting it to the max of 15% in the game option menu that my selection overrode the game option and it affected all AI's.
To be blunt this feature is a massive waste. No one in their right mind should want the dumb AI to make replacement buying decisions for them. That this appears to affect the AI's as well is really poor programming. This feature should only apply to humans and the AI's should be separately scripted to buy their own replacements, hopefully set to replace 100% of their losses. So instead the AI's spawn tons of new units that do useless things while their existing units are wiped out through too many battles and too much needless marching around in bad weather. No wonder I'm going to play all 7 major nations myself.