Yeah, I miss an aggressive, capable AI as well. They just never seem to do anything unless I trespass within a system of where they've got a colony, and doesn't appear to expand much at all. Not sure if this behaviour can be fixed with the 'scripting' capabilities?
Sure it can - it's all controlled right now by the AI scripts. The problem is a) They keep making treaties with non-aggression clauses reducing their potential territory and total colonies; b) They are expanding fast enough because they are not building enough scouts and exploring first before surveying; c) Their attack decision making needs to be tweaked.