Rome 2 multiplayer campaign

I'm planning to try Rome 2 MP campaign with a friend. It's gonna be vanilla game, regular grand campaign. I wanna know what are potential issues we might encounter. Or how stable the game is, does it freeze, crash, desync... Are there any usual bugs. Is it all fixable. Can we play long campaign or there's a higher chance it might break then. Tell me everything from your experience! Thank you.