@squidsarefriends @BigilusDickilus
Hard to say, I would caution that the games tend to be at most 3x (exploration, expansion, exploitation) although there can be some direct conflict in race depending on the expansion used.
I might suggest jump drive as a test to see if the other games would make to your families table regularly enough. The upside would be that if it sticks a lot of the symbology is directly transferrable so it should make it a lot easier to pick up any of the others.
@Finnbarr @squidsarefriends you take your turns simultaneously in both games. Also military tends to be overpowered only when you let it be. If someone is going military then they tend to have predictable needs. Are you feeding them explore and settle actions? Or are you letting them provide you with those while you produce and consume without it helping them?