Resource & economy System revised
This concept only covers economic features of civs. Military will be covered in a separate topic to keep this thing small. Some aspects of economy of course affect military as you’ll see later, but this is not the main argument at the moment. Military design and economic design will be tweaked to fit each other for every civ type. At first: I’d suggest to pair civilizations into groups (i.e. Hellenic Civs, Nordic civs, Indian/African civs and so
This still doesn't remove the aspect that soldiers not gathering resources leads to the enemy gaining a resource lead while the attacker starts an attack. Considering that all units shouldn't move as fast as they currently do this is an issue nontheless, even with your (more fleshed out and more original concept).
Another issue I have with this is that it adds additional, unnecessary micro for players. In 0 AD it's a nightmare to re-order male soldiers back to work after defending an attack