I will try it out, but I don't think the campaign AI should be this bad by default, the enemy is decent, but I'm guessing the friendly ones are just the stock one from the original game?

In multiple coop missions the allied AI barely manages do anything, I've just finished novax station and the order AI with 2 commanders died in like 10 minutes, it doesn't protect the ACU, doesn't build proper defenses, it just hogs mexes and builds a very simplistic base that gets rolled by the exponentially harder enemy AI, this is an issue because the mission was (probably) designed with the AI working in mind. Either make the AI at least hold the line or allow the player to take over.