Why do we have to start out at war with everyone?
You are basically at war with everyone until you can get a cease fire going. It would be nice if you had to actually declare war on AI civs before you started slugging it out with them. I think having everyone start out attacking eachothers scouts etc automatically and basically having to kill the first AI player you see is not that great and contributes more to the 'just kill them all and win' focus of the game making it more like a big RTS slugfest instead of a mix of 4x space strategy and RTS.
Some more diplomatic options and not starting out basically at war with every other AI at the start of the game would be good I think.