You decided out of good reasons not to have a one-session online multiplayer mode. As in more complex maps, turns can take up to an hour, it just does not make sense to us. a Dev said,
This is one of the dumbest things I've ever seen. If we want to spend a couple hours in a game why not let us. I know it may not be for everyone but the option should still be there. Especially since the game claims to have online multiplayer. This is borderline false advertising. As even if you are passing your save back and forth you are still only playing single player. No real time play or competitiveness. And you have to use outside software. This ruins the game. The ignorance of the developers to assume this would be enough is just that, ignorant.