Well, first off, it's awesome that it's possible to rejoin a game you were disconnected from. Happened to me, and it was nice that that wasn't that. Hopefully disconnects won't be a common thing.

However, disconnects are super obvious. My buddies told me I disconnected over voice chat. I wouldn't have noticed otherwise. The game just keeps on going. It should really be made more obvious.

But more to the point of what I wanted to say, it'd be nice if, when disconnected, the AI would be passive for a while. Maybe adjustable in the game settings, where you could set a timer. Like, it should still defend itself, but maybe for the next X minutes, not build new buildings, not cancel orders on units that already have some, not start new tech. It was pretty annoying to rejoin the game a minute later, only to see the AI had spent all my resources on dumb things and scattered my fleet to dumb places, re-assigning them into different fleets and all.